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Table 2 Comparison of the mean demographic variables between the mothers in the case and control groups and their relationships

From: Correlation between serum vitamin D level and neonatal indirect hyperbilirubinemia

Demographic characteristics of the mothers’ cases and controls [mean ± SD (min-max)]
  Study group (n = 30) Control group (n = 30) P
Mother age 27.13 ± 4.45 (17–33) 26.63 ± 6.85 (15–42) 0.739
Mother BMI 27.63 ± 4.41 (21.9–36.7) 25.41 ± 3.04 (21.5–33.6) 0.280
Abortion’s number 11 8 0.584
Delivery number 60 66 0.665
Mothers’ vitamin D use:
Regularly [n (%)] 4 (13) 3 (10) 0.247
Irregularly [n (%)] 3 (10) 8 (27)
None [n (%)] 23 (77) 19 (63)
  1. T-test and frequency and percentage are the tests used in this table
  2. BMI: Body mass index
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