Covariate

Exchangeable correlation

Random effect

Constant

2.0939

1.9024

Economic status

2.7850

4.0314

Age at marriage

1.2255

1.2563

Antenatal check-up

1.1075

1.1568

Place of work

2.1773

4.0152

Any miscarriage or abortion

1.3333

1.6835