The hypovitaminosis D in the premenopausal women and the postmenopausal elderly women in
Thailand was investigated. One hundred and six cases of the elderly women living in the urban area of Khon
Kaen province, one hundred and thirty-two cases of the elderly women living in the rural area of Khon Kaen
province, ninety-eight cases of the postmenopausal women who attended Menopausal Clinic, Srinagarind
Hospital, Khon Kaen province, and 357 premenopausal women from the multicenters in Thailand were the
subjects. The serum level of 25(OH)D < 35 ng/ml was used as the cut-off point of hypovitaminosis D. The
prevalence of hypovitaminosis D in these selected groups of women was 65.4, 15.4, 60.2, and 77.8 percent
respectively. The premenopausal female group had the highest prevalence of hypovitaminosis D and the
lowest level of 25 (OH) D whereas the group of the postmenopausal elderly women in the rural area had the
lowest prevalence of hypovitaminosis D and the highest 25 (OH) D level.

Keywords: Prevalence, Hypovitaminosis D, Elderly women, Postmenopausal women, Premenopausal women