Table 2.
Vitamin D and calcium intake and percent below the EAR among Jeddah premenopausal women residents (n=257) stratified by age.
| Total (n=257) | p valuea | 20–30 years (n=153) | 31–40 years (n=73) | 41–50 years (n=31) | p valueb | |
|---|---|---|---|---|---|---|
| Vitamin D intake from diet and supplement (IU/day) | ||||||
| Mean + SD | 643.4 + 873.1 | 488.2 ± 718.7 | 854.5 + 1060.3 | 912.3 + 946.8 | ||
| Median (IQR: P25–P75) | 236.4 (114.4–748.4) | 0.52 | 206.8 (99.5–403.9) | 276.9 (124.6–1632.1) | 556.1 (228.9–1693.8) | <0.001∗ |
| n (%) below EAR (400 IU/day)c | 167 (65) | 114 (74) | 42 (57.5) | 11 (35.5) | <0.001∗ | |
| Calcium intake from diet and supplement (mg/day) | ||||||
| Mean + SD | 770.9 + 421.9 | 725.2 ± 378.1 | 788.1 + 475.9 | 955.8 + 448.2 | ||
| Median (IQR: P25–P75) | 702.7 (469.6–981.2) | 0.005∗ | 681.3 (440.1–925.6) | 713.7 (416.4–989.1) | 962.8 (626.3–1100.0) | 0.015∗ |
| n (%) below EAR (800 mg/day)c | 156 (61) | 102 (66.7) | 43 (58.9) | 11 (35.5) | 0.005∗ |
EAR, estimated average requirement; P25–P75, 25th percentile and 75th percentile; SD, standard deviation. aThe Wilcoxon signed-rank test was performed to compare differences between median nutrient intake and EAR. bThe nonparametric Kruskal–Wallis test was performed to compare differences in intake among age categories. cAdequacy was determined using the estimated average requirement levels of 400 IU/day for vitamin D and 800 mg/day for calcium for women aged 19–50 years. ∗Significance at the <0.05 level.