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. 2022 Jan 11;12(1):e053196. doi: 10.1136/bmjopen-2021-053196

Table 3.

Multivariate logistic regression of interaction between breast feeding and preceding birth interval—PDHS (2017–2018)

Neonatal mortality Infant mortality Under-5 mortality
Length of breast feeding (months)
 Never breast fed 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Ever breast fed 0.015*** (0.01 to 0.04) 0.039*** (0.02 to 0.08) 0.040*** (0.02 to 0.08)
Preceding birth interval (months)
 36+ 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 First born 1.956 (0.31 to 12.30) 1.595 (0.30 to 8.35) 1.569 (0.30 to 8.29)
 <18 4.748** (1.54 to 14.64) 4.848** (1.58 to 14.85) 3.863* (1.21 to 12.28)
 18–23 1.028 (0.24 to 4.39) 0.995 (0.26 to 3.75) 0.798 (0.22 to 2.91)
 24–35 0.947 (0.28 to 3.22) 0.811 (0.26 to 2.51) 0.742 (0.24 to 2.25)
Never breast fed (36+) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
Never breast fed (first born) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
Never breast fed (<18) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
Never breast fed (18–23) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
Never breast fed (24–35) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
Ever breast fed (36+) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
Ever breast fed (first born) 2.477 (0.24 to 25.80) 1.293 (0.17 to 9.65) 1.763 (0.24 to 12.79)
Ever breast fed (<18) 1.276 (0.31 to 5.30) 0.959 (0.27 to 3.45) 1.333 (0.36 to 4.89)
Ever breast fed (18–23) 1.498 (0.20 to 11.12) 1.291 (0.26 to 6.49) 2.165 (0.46 to 10.16)
Ever breast fed (24–35) 0.332 (0.06 to 1.82) 0.687 (0.18 to 2.63) 1.012 (0.28 to 3.64)
Province
 Punjab 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Sindh 0.962 (0.51 to 1.82) 1.256 (0.73 to 2.17) 1.145 (0.69 to 1.89)
 KPK 1.540 (0.62 to 3.85) 1.553 (0.82 to 2.94) 1.259 (0.70 to 2.25)
 Balochistan 1.419 (0.65 to 3.12) 2.999** (1.49 to 6.04) 2.754*** (1.52 to 5.01)
 Islamabad 0.744 (0.24 to 2.34) 1.493 (0.73 to 3.06) 1.383 (0.74 to 2.60)
 FATA 0.810 (0.30 to 2.20) 0.690 (0.30 to 1.61) 0.581 (0.26 to 1.30)
Residence
 Rural 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Urban 1.649 (0.73 to 3.72) 1.064 (0.59 to 1.90) 0.979 (0.59 to 1.62)
Mother’s education
 No education 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Primary 1.133 (0.54 to 2.37) 1.173 (0.66 to 2.09) 0.968 (0.55 to 1.70)
 Secondary 1.019 (0.43 to 2.40) 1.039 (0.48 to 2.24) 0.894 (0.44 to 1.83)
 Higher 1.242 (0.38 to 4.05) 0.887 (0.32 to 2.42) 0.561 (0.22 to 1.45)
Father’s education
 No education 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Primary 1.943 (0.89 to 4.23) 1.549 (0.90 to 2.65) 1.495 (0.90 to 2.50)
 Secondary 0.701 (0.32 to 1.55) 0.639 (0.34 to 1.21) 0.649 (0.36 to 1.18)
 Higher 0.379 (0.11 to 1.33) 0.405 (0.16 to 1.03) 0.653 (0.27 to 1.56)
Child birth size
 Average 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Small 0.859 (0.45 to 1.66) 1.088 (0.64 to 1.84) 1.188 (0.72 to 1.95)
 Large 0.338 (0.11 to 1.05) 1.109 (0.48 to 2.57) 0.913 (0.40 to 2.10)
Sex of child
 Female 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Male 1.681 (0.88 to 3.21) 1.478 (0.90 to 2.44) 1.175 (0.74 to 1.87)
Mother’s current age
 30–35 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 36–40 0.711 (0.37 to 1.38) 0.828 (0.49 to 1.39) 0.828 (0.50 to 1.37)
 >40 1.548 (0.67 to 3.58) 1.520 (0.81 to 2.87) 1.369 (0.77 to 2.44)
Household wealth index
 Poorest 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Poorer 0.563 (0.27 to 1.15) 0.673 (0.38 to 1.18) 0.646 (0.38 to 1.11)
 Middle 0.141** (0.04 to 0.56) 0.337* (0.13 to 0.87) 0.455 (0.21 to 1.01)
 Richer 0.914 (0.29 to 2.91) 1.545 (0.65 to 3.66) 1.533 (0.73 to 3.22)
 Richest 0.544 (0.11 to 2.74) 1.119 (0.37 to 3.37) 1.008 (0.38 to 2.67)
Maternal employment status
 Not working 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00) 1.000 (1.00 to 1.00)
 Working 2.334** (1.23 to 4.43) 1.803* (1.05 to 3.10) 1.571 (0.94 to 2.63)
N 4230.000 4230.000 4230.000
F 8.510 9.311 8.028
P value 0.000 0.000 0.000

Exponentiated coefficients; 95% CIs in brackets.

*P<0.05, **p<0.01, ***p<0.001.

FATA, Federally Administered Tribal Area; KPK, Khyber Pakhtunkhwa; PDHS, Pakistan Demographic and Health Survey.