Variable

Odds ratio

95% Confidence interval for odds ratio

P-value

Lower limit

Upper limit

Parity

Primiparous

1.948

1.038

3.650

0.038*

Multiparous

1

Mode of delivery

Normal/vaginal

0.163

0.076

0.350

0.001*

Caesarean/instrumental

1

Postnatal medical history of newborn

Normal/stable

0.293

0.058

1.480

0.138

Admitted to NBSCU

1

Planned pregnancy

Yes

0.453

0.219

0.930

0.033*

No

1

Maternal medical illness in index pregnancy

Yes

0.980

0.438

2.190

0.960

No

1

Gestational age at birth

Before 37 weeks/Preterm

1.113

0.318

3.89

0.866

After 37 weeks

1

Birth weight

<2.5 kg

1.004

0.277

3.640

0.996

≥2.5 kg

1

First food given

Breast milk

5.307

2.706

10.400

0.001*

Formula feeding and others

1

Infant feeding decision made before pregnancy

Yes

2.670

1.116

6.380

0.027*

No

1

Maternal psychological illness

Yes

0.552

0.096

3.180

0.506

No

1