The prevalence of cluster<unk>  is approximately 3 to 150 per 100,000 individuals worldwide.*Worldwide Prevalence of patient with secondary<unk>  is approximately 18%. The prevalence of Migraine<unk>  is estimated to be 12 to 15 percent of general population.The prevalence of frequent episodic tension type<unk>  is 21.6 percent.Patients of all age groups may develop<unk> .Cluster<unk>  commonly affects individuals between 20 to 40years of age.Cluster<unk>  usually affects women of the Aferican -American and Caucasians.women are more commonly affected by migraine than men. 
Men are more commonly affected by cluster than women. The male to female ratio is approximately 2.5 to 1.
Headache epidemiology and demographics
Otalgia epidemiology and demographics
Dizziness epidemiology and demographics
Migraine epidemiology and demographics
Transient ischemic attack epidemiology and demographics
Trigeminal neuralgia epidemiology and demographics
Anxiety epidemiology and demographics
Multiple sclerosis epidemiology and demographics