Prevalence of hypovitaminosis D in elderly women living in urban area of Khon Kaen province, Thailand.

This study included 106 volunteer elderly women who were living in an urban area of Khon Kaen province. The mean (+/-SD) of age and of serum 25(OH)D concentration of these elderly women was 69.42 (+/-6.77) years and 33.32 (+/-7.14) ng/ml respectively. There was a significant inverse relationship between serum 25(OH)D and PTH concentration. Serum PTH concentration started to increase steeply when serum 25(OH)D concentration declined < or = 35 ng/ml and increased significantly when serum 25(OH)D concentration declined < or = 30 ng/ml. Furthermore mean (+/-SD) of serum 25(OH)D concentration in the group of osteopenia and osteoporosis of femoral neck was 35.25 (+/-6.77) and 30.92 (+/-6.49) ng/ml respectively. As a result, the prevalence of hypovitaminosis D in these selected elderly women would be at least 34.9 per cent, or as high as 65.1 per cent.

Bone mineral density of lumbar spines and proximal femur in the normal northeastern Thai women.

OBJECTIVE: To determine reference data for age-matched bone mineral density (BMD) of normal northeastern Thai women. MATERIAL AND METHOD: 350 northeastern Thai women aged 20-70 years were prospectively studied. After interview, the subjects were examined for BMD of lumbar spines and proximal femur. Mean BMD of each group was determined for each skeletal site. Standard deviation (SD) of BMD in the peak group was calculated to determine BMD cutoff level for diagnosing osteoporosis. RESULT: Peak average BMD of lumbar spines was at 40-45 years, whereas peak BMD of proximal femur was at 35-40 years. Mean value of peak BMD of lumbar spines and proximal femur was 1.226 and 1.035 g/cm2, respectively. According to T-score less than -2.5 SD criteria, osteoporosis of lumbar spines and proximal femur was considered when measured BMD was below 0.889 and 0.785 g/cm2, respectively. CONCLUSION: Our study provided the BMD reference data for northeastern Thai women.