TABLE 6. Baseline characteristics of the women according to treatment group.

Characteristic	Intervention (N = 1115)	Control (N = 1120)
Week of gestation at randomization	18.3 + 2.3§	18.3 + 2.3
Age (yr)	24.3 + 6.6	24.6 + 6.6
Married (%)	45.9	47.7
Employed	29.7	30.3
Parity	1.0 + 1.4	1.1 + 1.4
Gravidity	1.5 + 1.7	1.5 + 1.7
Interval since last delivery <24 mo (%)	29.7	30.1
White race (%)	60.3	59.8
School (yr)	8.4 + 3.7	8.4 + 3.8
Previous cesarean section (%)	18.0	21.5
Height (cm)	156.2 + 6.8	155.9 + 6.5
Weight before pregnancy (kg)	56.6 + 10.3	56.4 + 10.2
Feeling bad about the pregnancy (%) *	6.0	7.4
Bad relationship with partner (%) *	16.0	14.9
Bad feeling about previous delivery (%) *	32.8	32.3
High psychological distress level (%) * #	50.5	49.5
Low social support level & high psychological distress level (%) * #	16.6	16.5

§ Plus-minus values are means + SD.

* Based on responses in the baseline interview.

# A high psychological distress level was defined as a summary score above the median value for the total study population, and a low social support level as a summary score equal to or below the median value for the total study population.

Source: Villar et al. (24).