Table 1 Some baseline characteristics of pregnant women studied

Age (years)

27.1 ± 5.3

27.5 ± 6.0

0.513^b

Employed (%)

107 (67.2)

105 (66.0)

0.194^a

Schooling (years)

4.8 ± 1.0

4.9 ± 1.1

0.341^b

Marital status - Married (%)

78 (57.4)

72 (47.0)

0.111^a

Monthly per capita income (US $)

69.80 ± 21.30

72.30 ± 17.50

0.487^b

Primigesta (%)

90 (56.6)

87 (54.7)

0.220^a

BMI (Kg/m²)

27.0 ± 5.9

26.7 ± 5.3

0.530^b

Gestation age at admission (weeks)

15.0 ± 3.3

15.6 ± 3.5

0.086^b

Magnesium (mg/dL)

1.82 ± 0.15

1.81 ± 0.15

0.522^b

Hypomagnesemia (≤ 1.8 mg/dL)

76 (47.9)

83 (52.1)

0.432^a