the study was a randomized controlled trial and included a pre - test , post - test and delayed post - test with a control group . the independent variable was mindfulness training and the dependent variable was the quality of life of the warfare veterans with ptsd . all participants of the study were the warfare victims of iran - iraq war diagnosed with ptsd . from among the hospitals affiliated to the foundation of martyrs and veterans affairs of isfahan , shahid rajaee hospital was randomly selected . hidden and confidential assignment to put people in groups of forklift , after being determined by participants , one of the psychologists did not have knowledge of the research process , the hospital of the spinal cord was called veterans . he is based on the number of people counted in the crash and two group numbers and put the individual couples . the sample size for group therapy in clinical trials of psychology and counseling of 5 to 12 people is defined ( methods of research in psychology and educational sciences , delaware , 1390 ) . as well as the knowledge and methods of the mindfulness founder kabat zinn , segal and tizdel of the researchers called this the realm of mind - awareness group therapy with the setup on the volume of 8 to 15 people , it is worth noting the participants until after the intervention and control groups is determined ( after the post test ) had no more information about the research process . having administered psychiatric interviews with the aim of diagnosing ptsd according to dsm - iv - tr criteria by the hospital s psychiatrist , 32 individuals were randomly selected and assigned into two equal groups . besides , the effect of gender was controlled by including only males in the study . the participants had to fall within the age range of 35 - 60 and have secondary education . moreover , it was checked whether they suffered any active psychotic disease , showing symptoms of bipolar disorder , borderline personality disorder , anti - social and active suicidal tendencies and drug abuse during the last three months prior to the study ( 36 , 37 ) . two participants dropped out in each group as the study continued ( due to reasons like being discharged from the hospital or stopping participation in the study ) . the experimental group received mindfulness - based stress reduction ( mbsr ) training ( 39 ) . given the flexibility of mindfulness - based treatments , mindfulness training was designed with regards to the structure and features of the quality of life of the warfare victims with ptsd . on the whole the sessions are described as follows , during the session , a pre - test was administered . cordial relationship with the participants was established and the intended concepts were explained . also , the need for mindfulness training was justified and the issue of relaxation was introduced . the focus was on training relaxation for 14 muscle groups including forearm , calf , shin , thighs , abdomen , chest , shoulders , neck , lips , eyes , jaws , temples and forehead . the participants received relaxation training for the following six muscle groups : hands and arms , feet and thighs , abdomen and chest , neck and shoulders , jaws and forehead and lips and eyes . the inhale and exhale technique with calmness and no thinking and the breath watching technique were trained . also , as their homework , the participants were asked to practice mindfulness - based breathing for 20 minutes before going to bed . in this session , the participants were trained how to pay attention to body movements while breathing , to focus on body muscles and their movements , and to trace physical feelings , hearing , taste , etc . they were required to do mindfulness - based eating at home as their homework ( i.e. , paying attention to the taste and the appearance of foods ) . the participants were taught how to scan mind , positive and negative thoughts and their desirability and undesirability , to allow positive and negative thoughts into and out their minds without passing any judgment and to pay deep attention to them . as homework the training sessions four , five and six were repeated for 20 to 30 minutes . the following tools were used to collect data.demographic information sheet : the individual and demographic information of the participants were collected through the demographic information sheet . the items included in the sheet were age , gender , profession , education , marital status , disease history and.  1 . clinical interviews : in order to diagnose ptsd ( 12 ) and investigate other criteria for selecting the participants ( 19 , 25 ) clinical interviews were conducted.2 . clinical interviews were administered by the hospital s psychiatrist according to the fourth revised version of diagnostic and statistical manual for mental disorders ( dsm - iv - tr ) ( 12).3 . world health organization quality of life questionnaire ( whoqol-26 ) : the 26-item questionnaire on the quality of life proposed by the world health organization was used . the items were scored based on five - option likert scale . questions no . 3 , 4 , and 26 the questionnaire tests four categories ; namely , hygiene and physical well - being , psychiatric well - being , social life and living environments and conditions . the categories are used as a comprehensive scale and generally , include overall quality of life and general well - being levels . in a study conducted abroad , the validity of the questionnaire was found to be 90% for patients with chronic diseases , and 86% for normal people . the validity of the questionnaire in iran has been estimated to be 89% ( 40 ) . demographic information sheet : the individual and demographic information of the participants were collected through the demographic information sheet . the items included in the sheet were age , gender , profession , education , marital status , disease history and . clinical interviews : in order to diagnose ptsd ( 12 ) and investigate other criteria for selecting the participants ( 19 , 25 ) clinical interviews were conducted . clinical interviews were administered by the hospital s psychiatrist according to the fourth revised version of diagnostic and statistical manual for mental disorders ( dsm - iv - tr ) ( 12 ) . world health organization quality of life questionnaire ( whoqol-26 ) : the 26-item questionnaire on the quality of life proposed by the world health organization was used . the questionnaire tests four categories ; namely , hygiene and physical well - being , psychiatric well - being , social life and living environments and conditions . the categories are used as a comprehensive scale and generally , include overall quality of life and general well - being levels . in a study conducted abroad , the validity of the questionnaire was found to be 90% for patients with chronic diseases , and 86% for normal people . the validity of the questionnaire in iran has been estimated to be 89% ( 40 ) . having explained the aims of the study , the participants approval for their participation was obtained . in order to take research ethics into the account , both groups took the pre - test and then , the experimental group received eight 90-minute mt sessions . at the end of the treatment , both experimental and control groups took the post - test . also , the control group underwent drug therapy until the delayed - post test was administered . during that time therefore , to observe research ethics , eight mt sessions were held for them too . data were analyzed using the repeated measure anova function of spss version 17 . according to descriptive statistics , from among the participants assigned to the experimental group , 42.9 per cent % had secondary education , 42.9 per cent % had a high school diploma , 14.2and 14.2 per cent % had a bachelor s degree . for the control group , the numbers were 57.1 , 35.8 , and 7.1 , respectively , for secondary education , diplomas , and bachelor degrees . in terms of marital status , 92.9 per cent % of the participants in the experimental group was married and 7.1 per cent % was were divorced . for the control group , 71.1 per cent% of the participants were married , 7.1 per cent % was single , and 21.4 per cents % were remarried . the employment statistics of the experimental group indicated 57.1 per cent % employed , 35.7 per cent % unemployed , and 7.1 per cent % retired . the same statistics for the control group were 64.3 per cent% , 28.6 per cent% , and 7.1 per cent % respectively for the employed , unemployed , and retired , respectively . the mean and standard deviation for the experimental and control groups were , respectively , 84/350 and 26/457/49 , respectively . with regards to the type of paralysis , 92.9 per cent % of the participants in the experimental group was nero - psycho and the rest ( 7.1 percent% ) were suffering from a mixture of paralyses ( nero - psycho , physical , and chemical ) . 64.3 ; 64.3 percent % of the participants in the control group was were suffering from nero - psycho paralysis and the rest were suffering from a mixture of paralyses ( table 1 ) . table 2 shows demonstrates the mean and standard deviation of the investigated variables for both the experimental and control groups in the pre - test , post - test , and delayed post - test . as the table 2 presents , demonstrates , there was not a statistically significant difference for the quality of life and its relevant dimensions based on box and levin tests . the results of the repeated measures anova showed a statistically significant difference for the quality of life and its relevant dimensions between the means of pre - test , post - test , and delayed post - test for the experimental and control groups . moreover , the effect size was found to be 0.689 ( eta squared = 0.698 ) which shows the effectiveness of the treatment . the interactive effect was significant for all the variables , too ( table 3 . ) . therefore , given the mean scores , it can be said that there was a decrease in the post - test and delayed post - test scores for the experimental group in comparison with that of the control group . the experimental group received mindfulness - based stress reduction ( mbsr ) training ( 39 ) . given the flexibility of mindfulness - based treatments , mindfulness training was designed with regards to the structure and features of the quality of life of the warfare victims with ptsd . on the whole , eight 90- minute mindfulness training sessions were held . the sessions are described as follows , during the session , a pre - test was administered . cordial relationship with the participants was established and the intended concepts were explained . also , the need for mindfulness training was justified and the issue of relaxation was introduced . the focus was on training relaxation for 14 muscle groups including forearm , calf , shin , thighs , abdomen , chest , shoulders , neck , lips , eyes , jaws , temples and forehead . the participants received relaxation training for the following six muscle groups : hands and arms , feet and thighs , abdomen and chest , neck and shoulders , jaws and forehead and lips and eyes . the inhale and exhale technique with calmness and no thinking and the breath watching technique were trained . also , as their homework , the participants were asked to practice mindfulness - based breathing for 20 minutes before going to bed . in this session , the participants were trained how to pay attention to body movements while breathing , to focus on body muscles and their movements , and to trace physical feelings , hearing , taste , etc . they were required to do mindfulness - based eating at home as their homework ( i.e. , paying attention to the taste and the appearance of foods ) . the participants were taught how to scan mind , positive and negative thoughts and their desirability and undesirability , to allow positive and negative thoughts into and out their minds without passing any judgment and to pay deep attention to them . as homework the training sessions four , five and six were repeated for 20 to 30 minutes . during the session , a pre - test was administered . cordial relationship with the participants was established and the intended concepts were explained . also , the need for mindfulness training was justified and the issue of relaxation was introduced . the focus was on training relaxation for 14 muscle groups including forearm , calf , shin , thighs , abdomen , chest , shoulders , neck , lips , eyes , jaws , temples and forehead . the participants received relaxation training for the following six muscle groups : hands and arms , feet and thighs , abdomen and chest , neck and shoulders , jaws and forehead and lips and eyes . the inhale and exhale technique with calmness and no thinking and the breath watching technique were trained . also , as their homework , the participants were asked to practice mindfulness - based breathing for 20 minutes before going to bed . the participants were trained how to pay attention to body movements while breathing , to focus on body muscles and their movements , and to trace physical feelings , hearing , taste , etc . they were required to do mindfulness - based eating at home as their homework ( i.e. , paying attention to the taste and the appearance of foods ) . the participants were taught how to scan mind , positive and negative thoughts and their desirability and undesirability , to allow positive and negative thoughts into and out their minds without passing any judgment and to pay deep attention to them . as homework the training sessions four , five and six were repeated for 20 to 30 minutes . the following tools were used to collect data.demographic information sheet : the individual and demographic information of the participants were collected through the demographic information sheet . the items included in the sheet were age , gender , profession , education , marital status , disease history and.  1 . clinical interviews : in order to diagnose ptsd ( 12 ) and investigate other criteria for selecting the participants ( 19 , 25 ) clinical interviews were conducted.2 . clinical interviews were administered by the hospital s psychiatrist according to the fourth revised version of diagnostic and statistical manual for mental disorders ( dsm - iv - tr ) ( 12).3 . world health organization quality of life questionnaire ( whoqol-26 ) : the 26-item questionnaire on the quality of life proposed by the world health organization was used . the questionnaire tests four categories ; namely , hygiene and physical well - being , psychiatric well - being , social life and living environments and conditions . the categories are used as a comprehensive scale and generally , include overall quality of life and general well - being levels . in a study conducted abroad , the validity of the questionnaire was found to be 90% for patients with chronic diseases , and 86% for normal people . the validity of the questionnaire in iran has been estimated to be 89% ( 40 ) . demographic information sheet : the individual and demographic information of the participants were collected through the demographic information sheet . the items included in the sheet were age , gender , profession , education , marital status , disease history and . clinical interviews : in order to diagnose ptsd ( 12 ) and investigate other criteria for selecting the participants ( 19 , 25 ) clinical interviews were conducted . clinical interviews were administered by the hospital s psychiatrist according to the fourth revised version of diagnostic and statistical manual for mental disorders ( dsm - iv - tr ) ( 12 ) . world health organization quality of life questionnaire ( whoqol-26 ) : the 26-item questionnaire on the quality of life proposed by the world health organization was used . the questionnaire tests four categories ; namely , hygiene and physical well - being , psychiatric well - being , social life and living environments and conditions . the categories are used as a comprehensive scale and generally , include overall quality of life and general well - being levels . in a study conducted abroad , the validity of the questionnaire was found to be 90% for patients with chronic diseases , and 86% for normal people . the validity of the questionnaire in iran has been estimated to be 89% ( 40 ) . having explained the aims of the study , the participants approval for their participation was obtained . in order to take research ethics into the account , both groups took the pre - test and then , the experimental group received eight 90-minute mt sessions . at the end of the treatment , two months later , the groups took the delayed post - test . also , the control group underwent drug therapy until the delayed - post test was administered . during that time therefore , to observe research ethics , eight mt sessions were held for them too . data were analyzed using the repeated measure anova function of spss version 17 . according to descriptive statistics , from among the participants assigned to the experimental group , 42.9 per cent % had secondary education , 42.9 per cent % had a high school diploma , 14.2and 14.2 per cent % had a bachelor s degree . for the control group , the numbers were 57.1 , 35.8 , and 7.1 , respectively , for secondary education , diplomas , and bachelor degrees . in terms of marital status , 92.9 per cent % of the participants in the experimental group was married and 7.1 per cent % was were divorced . for the control group , 71.1 per cent% of the participants were married , 7.1 per cent % was single , and 21.4 per cents % were remarried . the employment statistics of the experimental group indicated 57.1 per cent % employed , 35.7 per cent % unemployed , and 7.1 per cent % retired . the same statistics for the control group were 64.3 per cent% , 28.6 per cent% , and 7.1 per cent % respectively for the employed , unemployed , and retired , respectively . the mean and standard deviation for the experimental and control groups were , respectively , 84/350 and 26/457/49 , respectively . with regards to the type of paralysis , 92.9 per cent % of the participants in the experimental group was nero - psycho and the rest ( 7.1 percent% ) were suffering from a mixture of paralyses ( nero - psycho , physical , and chemical ) . 64.3 ; 64.3 percent % of the participants in the control group was were suffering from nero - psycho paralysis and the rest were suffering from a mixture of paralyses ( table 1 ) . table 2 shows demonstrates the mean and standard deviation of the investigated variables for both the experimental and control groups in the pre - test , post - test , and delayed post - test . as the table 2 presents , demonstrates , there was not a statistically significant difference for the quality of life and its relevant dimensions based on box and levin tests . the results of the repeated measures anova showed a statistically significant difference for the quality of life and its relevant dimensions between the means of pre - test , post - test , and delayed post - test for the experimental and control groups . moreover , the effect size was found to be 0.689 ( eta squared = 0.698 ) which shows the effectiveness of the treatment . the interactive effect was significant for all the variables , too ( table 3 . ) . therefore , given the mean scores , it can be said that there was a decrease in the post - test and delayed post - test scores for the experimental group in comparison with that of the control group . the results of the bonferroni test showed a decrease in the scores of the quality of life and its relevant dimensions in both the post - test and delayed post - test for the experimental group . also , for the control group , there was a statistically significant difference between the mean scores of the post - test . however , it was much less in comparison with that of the experimental group ( table 3 ) . the present study aimed at investigating how mindfulness training would influence the quality of life of warfare veterans with ptsd . the results of the repeated measures anova indicated a decrease in the scores of the quality of life and its relevant dimensions for the experimental group in both post - test and delayed post - test . also , the results of the post hoc showed a drop in the scores of the quality of life and its relevant dimensions in the post - test and delayed post - test in comparison with the pre - test for the experimental group . the results of the study are similar to those of earlier studies supporting the effectiveness of the mindfulness - based interventions in reducing the symptoms of psychological disorders and medical conditions ( 30 ) , anxiety disorders ( 30 ) , cancers ( 31 ) , depression ( 32 ) on the one hand and improving affection and temperament ( 34 ) and mental health ( 35 ) on the other . also , since the previous researches have shown the effectiveness of mindfulness training in ameliorating depression , psychological disorders , anxiety and the quality of life of those experiencing stressful and traumatic situations ( 25 , 38 , 37 , 36 ) , it can be claimed that the results of the present study confirm the earlier body of research . ptsd produces changes in the feelings and behaviors of the sufferers such as an increase in their intimacy , social and sexual activities , feeling of detachment and alienation and affective and excitement coldness ( 19 , 20 ) . therefore , employing effective therapeutic and rehabilitative strategies to reduce the resultant problems can improve and promote the quality of life of the warfare veterans with pstd . findings of the study indicated a significant relationship between the effectiveness of mindfulness techniques and other dimensions of life such as mental health which is similar to the findings of earlier studies . some studies have reported the effectiveness of mindfulness training in improving mental well - being and health ( 20 , 22 , 24 ) . also , the results of this study showed that mindfulness techniques can boost physical health . from this perspective , the findings confirm those of earlier studies ( 21 , 23 ) . the same positive effects are supported by the results of the study in terms of social relationships which have already been reported by other studies ( 16 , 20 , 25 ) . as shown before , positive and statistically significant changes in the quality of life of the warfare veterans with pstd this can be accounted for by the idea that since mindfulness trainings modify judgeless feelings , it may bring about more physical and psychological consciousness , and may help a judgeless acceptance of excitement and physical phenomena ( 41 ) , and it can also play an important role in improving the quality of life of warfare veterans . this conclusion is defendable when seen in the light of the findings of the previous studies which show the potentials of mindfulness trainings for modifying negative thoughts and behaviors that lead to positive health - related changes ( 42 ) . moreover , attending mindfulness workshops causes individuals to change their thoughts in a way that helps them to conceive thoughts as just mental and transient phenomena rather than unchangeable realities ( 43 ) . to put it simply , it can be noted that since mindfulness training raises the individuals consciousness of psychological and physical feelings , it results in a realistic acceptance of life events and confidence , deep sympathy and love toward others ( 44 ) . post and veid believe that the effectiveness of mindfulness - based treatments is due to the intervention of spiritual and religious beliefs . in general , the researchers have a positive orientation towards the effectiveness of those psychotherapy - oriented treatments in which the focus is on religion , mindfulness and praying , or religious trainings ( 36 ) . reducing stress by means of mindfulness techniques significantly increases psychotherapy - based well - being and mindfulness and deceases stress and physical signs . the time spent in practice sessions is connected to an improvement in well - being and mindfulness level . therefore , mindfulness can be considered as a mediator which ameliorates psychological performance and reduces stress ( 28 ) . it has been proved that mindfulness training is effective in decreasing depression and anxiety of ptsd sufferers and improving their quality of life ( 16 , 27 , 28 , 29 ) . also , there are reports of the efficacy of the method in heightening affection , temperament and mental health of chemical warfare victims ( 25 , 26 ) . in general , mindfulness - based interventions have been effective in decreasing temperament and anxiety problems , bipolar and borderline personality disorders , chronic pains and cancers ( 37 ) . directly and indirectly , mindfulness training improves health within a biological - psychological - social framework ( 45 ) . since mindfulness training helps individuals to understand their feelings , direct their attention , accept experiences as they are and prevent passing judgments on their thoughts , it is likely that the method can reduce the symptoms of those suffering from ptsd . indirectly , mindfulness techniques such as body monitoring can lead to a better understanding of signals and a decrease in unrealistic judgments through making the sufferers more capable of recognizing their feelings ( 25 ) . although individuals have their own idiosyncrasies , a mindfulness training team paves the way for them to understand and learn more about their feelings , thoughts , excitements and the people around them . consequently , this makes them capable of leading a more efficient life when they are out of the groups ( 28 ) . this increases their sensitivity and mistrust and keeps them fearful ; this state , in turn , causes individuals to obsessively and relentlessly think of past and future events ( 36 ) . in such cases , practicing conscious breathing as the locus of attention and reference can help such people to get back to their normal condition . getting back to oneself is experienced once individuals ponder over their past or future and operate according to their thoughts and feeling patterns ( 33 ) . pstd sufferers have problems with controlling their annoyance , and this negatively influences their marital relationship and affection and reduces family performance and leads to low quality of life . mindfulness practices improve mental ability in a way that getting back to the normal state even in stressful situations becomes possible ( 33 ) . in fact , conscious attention to the present time teaches individuals new ways of understanding and responding to all intrinsic feelings and thus they develop the ability to identify feelings , experiences and thoughts ( 27 ) . paying conscious attention to the present time is composed of two concepts : self - management attention and acceptance which is accompanied by a tendency towards experiencing ( 27 ) . the concept of acceptance consists of three stages : observing psychological events , freeing oneself from a tendency to a change in form or the frequency of the event , and finally distinguishing between reality and psychological experiences . in other words , acceptance as a main component of mindfulness - based treatments helps individuals look at psychological events as understandable and transient states instead of considering them as disastrous , intolerable and unavoidable ( 33 ) . the members of the experimental group reported an increase in their daily performance and activity during the workshop and the period following that . this can be due to a decrease in the number of avoiding experiences and experience - seeking motivation in them . it is supposed that mindfulness - practices encourage participants to keep a positive attitude towards curiosity and openness to experiences ( 38 ) . in addition , the practices develop accuracy and clarity , enhance understanding and insight towards incompatible , destructive and automatic behaviors , and make it possible for individuals to respond or stop the behavior instead of reacting to it ( 30 , 27 , 25 ) . the new research trend exploring the pathological roots of psychological disorders based on evaluating mindfulness shows the inadequacy of this ability in a number of patients with psychiatric problems . also , available literature suggests that mindfulness - based treatments play a role in reducing and ameliorating the symptoms of anxiety and depression . by considering mindfulness as a social cognition ability of the brain , researchers believe that employing strategies for assessing and training social cognition to treat patients suffering from psychiatric disorders is a necessity ( 46 ) . it can be claimed that since mindfulness training draws the attention and consciousness of individuals to physical and psychological feelings , it can help them to identify their abilities to cope with stress , to become professionally influential and to interact and cooperate with other members of the society ( 34 ) . this is due to the fact that one of the main dimensions of mindfulness - based treatments is that individuals learn to accept their negative emotions and thoughts without judging them and experience mental events in a positive way ( 42 ) . another point which should be borne in mind with regards to mindfulness - based treatments is the mental re - presentation of real life objects which are out of the control of human beings . hence , mindfulness and its training can play a significant role in improving the quality of life of those warfare veterans with ptsd and can modify the social behaviors stemming from their nero - psycho problems . mindfulness training is one of the therapeutic methods working through psychotherapy and stress reduction . in this method , individuals are trained to re - present objects in their mind which are out of immediate control . actually , the method is a combination of body relaxing and mindfulness ( 27 ) . rayon and dosy ( as cited in 35 ) showed that mindfulness help individuals to modify negative behavioral patterns and automatic thoughts , resulting in adaptive positive health - related behaviors . also , it should be noted that one of the positive dimensions of mindfulness is the increase in the amount of individuals attention to thoughts , excitements and tendencies , causing adaptive and positive psychiatric behaviors to coordinate . additionally , it can improve the abilities of individuals in a way that directs them to individual and social activities and raises their interest in them ( 42 ) . therefore , providing mindfulness training for the ptsd warfare veterans , who suffer from nero - psycho , professional and inter - individual problems due to the experiencing damaging and traumatic situations , can have instructive effects . like all research projects , this study had limitations , some of which were the small number of the participants , the short interval between the post - test and delayed post - test and gender ( females were not included ) . larger samples , longer intervals between post - tests and delayed post - tests and inclusion of females with ptsd can make the findings of the present study more generalizable and reliable . attending war zones and facing stressful events cause physical problems and psychological disorders and may reduce the quality of life of the people experiencing such events . the findings of the study suggest that mindfulness training can improve the quality of life of such people .