Table 2 Summary statistics of variables used for analysis

Duration

16.050

(10.745)

27.153

(17.837)

26.751

(17.597)

26.782

(18.088)

 Wealth status

2.971

(1.430)

2.940

(1.422)

2.934

(1.402)

2.990

(1.423)

 Poorest

0.218

(0.413)

0.214

(0.410)

0.207

(0.405)

0.208

(0.406)

 Poor

0.183

(0.387)

0.200

(0.400)

0.202

(0.401)

0.194

(0.395)

 Middle

0.208

(0.406)

0.215

(0.411)

0.235

(0.424)

0.199

(0.399)

 Richer

0.191

(0.393)

0.170

(0.376)

0.162

(0.368)

0.200

(0.400)

 Richest

0.199

(0.399)

0.199

(0.399)

0.194

(0.396)

0.200

(0.400)

 Mothers’ age (years)

28.651

(6.783)

30.083

(7.150)

30.498

(7.140)

30.084

(7.019)

 Teenage mother

0.127

(0.333)

0.072

(0.259)

0.069

(0.254)

0.071

(0.257)

 20–29

0.495

(0.500)

0.478

(0.500)

0.447

(0.497)

0.470

(0.499)

 30–39

0.351

(0.477)

0.359

(0.480)

0.395

(0.489)

0.375

(0.484)

 Over 40

0.084

(0.278)

0.131

(0.338)

0.124

(0.330)

0.115

(0.319)

 No education

0.397

(0.489)

0.468

(0.499)

0.475

(0.499)

0.378

(0.485)

 Primary

0.547

(0.498)

0.181

(0.385)

0.214

(0.410)

0.241

(0.428)

 Secondary or higher

0.055

(0.229)

0.351

(0.477)

0.311

(0.463)

0.380

(0.486)

 No education

0.367

(0.482)

0.402

(0.490)

0.459

(0.498)

0.388

(0.487)

 Primary

0.463

(0.499)

0.080

(0.272)

0.083

(0.276)

0.087

(0.282)

 Secondary or higher

0.170

(0.375)

0.517

(0.500)

0.457

(0.498)

0.525

(0.499)

 Improved water

0.508

(0.500)

0.544

(0.498)

0.594

(0.491)

0.768

(0.422)

 Improved sanitation

0.653

(0.476)

0.589

(0.492)

0.587

(0.493)

0.531

(0.499)

 Male

0.514

(0.500)

0.492

(0.500)

0.507

(0.500)

0.510

(0.500)

 Birth order

3.543

(2.254)

3.573

(2.370)

3.612

(2.341)

3.382

(2.216)

  Below 24

0.096

(0.294)

0.104

(0.306)

0.104

(0.305)

0.106

(0.308)

  24–36

0.278

(0.448)

0.260

(0.439)

0.257

(0.437)

0.236

(0.425)

  Above 36

0.420

(0.494)

0.408

(0.492)

0.418

(0.493)

0.429

(0.495)

  Number of children aged ≤5

1.837

(0.962)

1.764

(0.992)

1.779

(0.941)

1.783

(0.981)

  Twin

0.047

(0.211)

0.043

(0.204)

0.040

(0.196)

0.044

(0.205)

 Urban

0.279

(0.448)

0.216

(0.411)

0.271

(0.445)

0.334

(0.472)

 Rural

0.721

(0.448)

0.784

(0.411)

0.729

(0.445)

0.666

(0.472)

 Southern Belt

0.289

(0.453)

0.288

(0.453)

0.242

(0.429)

0.259

(0.438)

 Eastern-Volta

0.216

(0.412)

0.197

(0.398)

0.153

(0.361)

0.169

(0.375)

 Ashanti-Brong

0.277

(0.448)

0.204

(0.403)

0.270

(0.444)

0.236

(0.424)

 Northern Belt

0.218

(0.413)

0.310

(0.463)

0.334

(0.472)

0.336

(0.472)

 No religion

0.149

(0.356)

0.099

(0.299)

0.078

(0.268)

0.050

(0.218)

 Christianity

0.672

(0.470)

0.636

(0.481)

0.657

(0.475)

0.661

(0.474)

 Muslim

0.127

(0.332)

0.141

(0.348)

0.207

(0.405)

0.201

(0.401)

 Traditional

0.051

(0.221)

0.097

(0.296)

0.057

(0.232)

0.086

(0.280)

 Others

0.002

(0.048)

0.027

(0.162)

0.001

(0.032)

0.002

(0.048)