The prevalence of<unk>  varies by geographic region. For infants in the United States,<unk>  without bleeding may occur in as many as 50% of infants younger than 5 days old, with the classic hemorrhagic disease occurring in 0.25-1.7% of infants. Therefore, the Committee on Nutrition of the American Academy of Pediatrics recommends that 0.5 to 1.0 mg<unk> <unk> 1 be administered to all newborns shortly after birth. Postmenopausal and elderly women in Thailand have high risk of<unk> , compared with the normal value of young, reproductive females. Current dosage recommendations for<unk> <unk>  may be too low. The deposition of calcium in soft tissues, including arterial walls, is quite common, especially in those suffering from atherosclerosis, suggesting that<unk>  is more common than previously thought. Because colonic bacteria synthesize a significant portion of the<unk> <unk>  required for human needs, individuals with disruptions to or insufficient amounts of these bacteria can be at risk for<unk> . Newborns, as mentioned above, fit into this category, as their colons are frequently not adequately colonized in the first five to seven days of life. Another at-risk population comprises those individuals on any sort of long-term antibiotic therapy, as this can diminish the population of normal gut flora.
Vitamin K deficiency
Factor VII deficiency
Factor XII deficiency
Properdin deficiency
Factor XIII deficiency
Protein C deficiency
Venom-induced consumption coagulopathy
Factor X deficiency