Table 4.
Simultaneous linear regression between specific maternal characteristics and 25(OH)D status (ng/mL) (N = 150).
| Maternal characteristics | β value | P value |
|---|---|---|
| Age (years) | 0.12 | 0.13 |
| Weight (kg) | −0.01 | 0.89 |
| Phytate : calcium1,2 | −0.03 | 0.72 |
| Phosphorus (mg/d) | 0.11 | 0.16 |
| Hospital (government) Referent group: private nursing home |
−0.20 | 0.03 |
| Sun exposure index1,3 | 0.31 | <0.001 |
| Time of day (24 hours) | −0.08 | 0.30 |
Dependent variable: 25(OH)D status (ng/mL).
R 2 = 0.19, adjusted R 2 = 0.16, F (7, 142) = 5.0, and P < 0.001.
1Log transformed variables.
2Phytate : calcium ratio = mmol/day phytate intake/mmol/day calcium intake.
3% body surface area exposed to sunlight × hours of sun exposure/week. Higher values indicate greater exposure to sunlight.
Time of day (24 hours) refers to the time of the day to sun exposure in 24-hour format.