Table 2 Summary result of the final log-logistic AFT model

Wealth index

Poor

Ref

Ref

Ref

Ref

Ref

Middle

0.0283

1.029

[1.006,1.05]

0.01132

0.0125*

Rich

0.0293

1.029

[1.006,1.05]

0.01048

0.0052*

Religion

Orthodox

Ref

Ref

Ref

Ref

Ref

Catholic

0.0648

1.1

[0.98, 1.16]

0.04144

0.12

Protestant

0.0052

1.01

[0.98, 1.03]

0.01123

0.599

Muslim

0.042

1.04

[1.02, 1.06]

0.0104

< 0.001*

Traditional

0.0229

1.02

[0.96,1.07]

0.03408

0.50

Other

0.106

1.11

[1.03,1.28]

0.03829

0.0056*

Age at first birth

≤ 15

Ref

16–20

0.0488

1.04

[1.03, 1.07]

0.01026

< 0.001*

21–25

0.185

1.2

[1.17, 1.23]

0.01179

< 0.001*

≥ 26

0.317

1.4

[1.32,1.43]

0.01848

< 0.001*

Marital status

Single

Ref

Married

0.0398

1.04

[1.01,1.06]

0.01242

0.0014*

Divorced

0.0942

1.1

[1.06,1.14]

0.01739

< 0.001*

Windowed

0.0704

1.07

[1.03,1.11]

0.01883

< 0.001*

Separated

0.014

1.01

[0.97,1.05]

0.02057

< 0.001*

Husbands education

No-education

Ref

Ref

Ref

Ref

Ref

Primary

0.389

1.48

[1.45,1.5]

0.0077

< 0.001*

Secondary and above

1.02

2.77

[2.71, 2.8]

0.0118

< 0.001*

Women education

No-education

Ref

Primary

0.0015

1.002

[0.98,1.02]

0.0067

0.863

Secondary and above

0.108

1.11

[1.08,1.15]

0.015

< 0.001*