Table 2 Adjusted linear regression models for lung function at age 10 years and breastfeeding duration
Breastfeeding durationModel 1*Model 2†
FVC (ml)FEV1 (ml)FEV1/FVC (%)PEF (ml/sec)FEV1 (ml)PEF (ml/s)
⇠(SE)p Value⇠(SE)p Value⇠(SE)p Value⇠(SE)p Value⇠(SE)p Value⇠(SE)p Value
Not breastfedRefRefRefRefRefRef
>2 months9.6 (22.4)0.6714.3 (21.3)0.500.28 (0.57)0.62114.7 (70.2)0.107.16 (12.8)0.57105.9 (67.2)0.12
2 to <4 months6.9 (25.7)0.7916.8 (24.5)0.490.57 (0.65)0.38143.4 (80.6)0.0811.5 (14.7)0.43137.1 (77.2)0.08
⩾4 months54.0 (21.1)0.0139.5 (20.1)0.05−0.40 (0.53)0.45180.8 (66.1)0.006−1.6 (12.1)0.90131.7 (63.5)0.04

  • Number of children included in the analysis for the FVC model was 929.

  • *Model 1 was adjusted for height, weight and birth weight (as continuous variables) and for gender, family social status cluster, maternal education (as categorical variables).

  • †For model 2, in addition to all the variables in model 1, we also adjusted for FVC.

  • ‡Model coefficient (SE).

  • FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; PEF peak expiratory flow; Ref, reference group.