Research Article

Widespread 25-Hydroxyvitamin D Deficiency in Affluent and Nonaffluent Pregnant Indian Women

Table 4

Simultaneous linear regression between specific maternal characteristics and 25(OH)D status (ng/mL) (N = 150).

Maternal characteristics valueP value

Age (years)0.120.13
Weight (kg)−0.010.89
Phytate : calcium1,2−0.030.72
Phosphorus (mg/d)0.110.16
Hospital (government)
Referent group: private nursing home
−0.200.03
Sun exposure index1,30.31<0.001
Time of day (24 hours)−0.080.30

Dependent variable: 25(OH)D status (ng/mL).
= 0.19, adjusted = 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.