Table 3

Regression coefficients and 95% CI of birth weight and birth length in relation to socioeconomic trajectory

Socioeconomic trajectory	Birth weight (kg)				Birth length (cm)
Socioeconomic trajectory	Crude	Model 1	Model 2	Model 3	Crude	Model 1	Model 2	Model 3
Mothers	p=0.005	p=0.001	p=0.007	p=0.003	p=0.004	p=0.009	p=0.05	p=0.04
Always poor	Reference	Reference	Reference	Reference	Reference	Reference	Reference	Reference
Poor→non-poor	−0.08 (−0.38 to 0.23)	−0.15 (−0.50 to 0.19)	−0.04 (−0.39 to 0.31)	0.01 (−0.32 to 0.35)	−0.05 (−1.47 to 1.37)	−0.48 (−2.14 to 1.17)	0.21 (−1.42 to 1.84)	0.36 (−1.26 to 1.98)
Non-poor→poor	0.29 (0.06 to 0.52)	0.5 (0.10 to 0.60)	0.35 (0.10 to 0.60)	0.38 (0.14 to 0.61)	1.13 (0.08 to 2. 17)	1.26 (0.05 to 2.46)	1.28 (0.13 to 2.44)	1.35 (0.21 to 2.49)
Never poor	0.33 (0.10 to 0.55)	0.44 (0.17 to 0.70)	0.38 (0.12 to 0.65)	0.42 (0.17 to 0.67)	1.77 (0.74 to 2.80)	1.88 (0.62 to 3.14)	1.55 (0.33 to 2.77)	1.65 (0.44 to 2.86)
Fathers	p=0.42	p=0.68	p=0.64	p=0.66	p=0.82	p=0.84	p=0.85	p=0.86
Always poor	Reference	Reference	Reference	Reference	Reference	Reference	Reference	Reference
Poor→non poor	0.33 (−0.08 to 0.76)	0.27 (−0.17 to 0.71)	0.29 (−0.16 to 0.73)	0.28 (−0.17 to 0.73)	0.65 (−1.01 to 2.31)	0.54 (−1.21 to 2.29)	0.54 (−1.23 to 2.32)	0.5 (−1.28 to 2.29)
Non-poor→poor	0.14 (−0.15 to 0.43)	0.03 (−0.32 to 0.38)	0.04 (−0.31 to 0.40)	0.04 (−0.31 to 0.40)	0.24 (−0.91 to 1.38)	−0.28 (−1.66 to 1.10)	−0.28 (−1.68 to 1.12)	−0.3 (−1.70 to 1.11)
Never poor	0.12 (−0.15 to 0.39)	0.04 (−0.29 to 0.37)	0.05 (−0.29 to 0.38)	0.05 (−0.29 to 0.38)	0.42 (−0.67 to 1.51)	0.06 (−1.37 to 1.25)	0.06 (−1.39 to 1.27)	−0.08 (−1.41 to 1.26)

Model 1: anthropometry of the grandmother (weight, height, body mass index (BMI) and age). Model 2: model 1+parental birth weight. Model 3: model 2+parental BMI in 2004.