Table 2.
Comparison of total 25-hydroxyvitamin D (25(OH)D) concentrations among premenopausal and postmenopausal women in summer and winter groups: Saudi female out-patients, January–December 2009
| Group A (summer) | Group B (winter) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Group A1 (n 425; premenopausal) | Group A2 (n 234; postmenopausal) | Group B1 (n 543; premenopausal) | Group B2 (n 354; postmenopausal) | ||||||
| Mean | se | Mean | se | Mean | se | Mean | sm | P value | |
| 25(OH)D (nmol/l) | 33·3 | 1·65 | 44·4 | 2·3 | 28·5 | 1·16 | 36·3 | 1·51 | P < 0·01 (A1 v. B1 and A2 v. B2) |
| P < 0·001 (A1 v. A2 and B1 v. B2) | |||||||||
| Deficient (nmol/l) | 15·3 | 0·51 | 18·5 | 0·83 | 16·1 | 0·41 | 18·1 | 0·65 | P < 0·001 (A1 v. A2 and B1 v. B2) |
| Insufficient (nmol/l) | 48·1 | 1·01 | 51·0 | 1·02 | 50·8 | 1·14 | 51·9 | 1·03 | P < 0·05 (A1 v. A2 and A1 v. B1) |
| Optimal (nmol/l) | 112·6 | 4·44 | 100·7 | 4·27 | 106·5 | 5·87 | 103·6 | 4·18 | P > 0·05 |