Table 3 Multivariate logistic regression analysis of variables associated with CS

Antenatal ultrasound scans (frequencies)*^&

1.342 (1.265-1.423)

1.346 (1.267-1.429)

1.323 (1.247-1.404)

1.319 (1.241-1.401)

Maternal education level (years)*

-

-

-

Husband education level (years)*

-

1.058(1.018-1.099)

-

1.059(1.019-1.101)

Maternal age (24-31 y as control)

≤ 23 y

-

0.790(0.643-0.971)

-

0.766(0.641-0.943)

≥ 32 y

-

1.294(1.049-1.595)

-

1.441(1.129-1.840)

Family annual income (≤ 3000 yuan as control)

3001-7499 yuan.

-

1.225(1.008-1.487)

-

≥ 7500 yuan

-

1.294(1.008-1.661)

-

Antenatal care^# (No as control)

Yes

-

-

Pregnancy complications (No as control)

Yes

-

-

1.449(1.177-1.783)

1.423(1.154-1.754)

Previous adverse pregnant outcomes (No as control)

Yes

-

-

1.584(1.107-2.211)

1.584(1.117-2.246)

Primiparity (No as control)

Yes

-

-

1.362(1.079-1.718)