This study investigated the prevalence of hypovitaminosis D in the elderly women living in the rural
area of Thailand. The subjects were 132 cases (but just 129 cases were used in the statistical analysis?) of the
elderly women who were living in the rural area of Khon Kaen province. The mean (+ SD) of age and the mean
(+ SD) of serum 25 (OH) D concentration of these elderly women were 71.55 (+ 5.26) years and 44.9 (+ 11.02)
ng/ml respectively. There was a significant inverse relationship (or correlation? Notice your analysis.) between
the serum 25 (OH) D and the PTH concentration. The serum PTH concentration increased significantly when
the serum 25 (OH) D concentration was at < 35 ng/ml. As a result, the prevalence of hypovitaminosis D in these
selected elderly women was 17.4 per cent.

Keywords: Prevalence, Hypovitaminosis D, Elderly women, Rural area