Table 2 Multiple linear regression of the association between HAP scores and BSID scores.

From: Assessing the association between household air pollution exposure and child heath in Mongolia: a birth-cohort study

 

13-months

36-months

Mental

Psychomotor

Mental

Psychomotor

Mean (SD)

β (95% CI)

Mean (SD)

β (95% CI)

Mean (SD)

β (95% CI)

Mean (SD)

β (95% CI)

Unadjusted

N = 1088

− 0.13 (− 0.19, − 0.06)

N = 1094

− 0.15 (− 0.25, − 0.05)

N = 685

− 0.24 (− 0.32, − 0.15)

N = 687

− 0.25 (− 0.33, − 0.16)

105.50 (10.63)

P < 0.001

99.96 (15.96)

P = 0.003

92.43 (11.01)

P < 0.001

100.90 (11.27)

P < 0.001

Model 1

N = 1038

− 0.10 (− 0.17, − 0.04)

N = 1044

− 0.13 (− 0.22, − 0.02)

N = 649

− 0.23 (− 0.31, − 0.14)

N = 652

− 0.24 (− 0.33, − 0.15)

105.48 (10.69)

P = 0.002

100.01 (15.89)

P = 0.021

92.50 (11.00)

P < 0.001

100.99 (11.28)

P < 0.001

Model 2

N = 855

− 0.08 (− 0.16, − 0.00)

N = 862

− 0.08 (− 0.20, 0.04)

N = 550

− 0.08 (− 0.18, 0.02)

N = 552

− 0.13 (− 0.23, − 0.30)

105.23 (10.66)

P = 0.049

99.73 (15.95)

P = 0.217

92.61 (11.13)

P = 0.115

101.12 (11.06)

P = 0.011

Model 3

N = 851

− 0.09 (− 0.17, − 0.01)

N = 858

− 0.09 (− 0.21, 0.03)

N = 546

− 0.09 (− 0.19, 0.01)

N = 548

− 0.12 (− 0.23, − 0.02)

105.26 (10.65)

P = 0.035

99.78 (15.97)

P = 0.154

92.53 (11.11)

P = 0.092

101.06 (11.04)

P = 0.016

  1. Model 1: Adjusted for sex, birthweight, gestational age, date of birth.
  2. Model 2: Model 1 plus parity, maternal marital status, maternal age, maternal education, maternal employment, postnatal depression.
  3. Model 3: Model 2 plus type of delivery, swaddling, breastfeeding, number of smokers.
  4. Associated covariates can be found in Supplementary Appendix 1.
  5. β Coefficient, 95% CI 95% confidence intervals, n number of observations within the model, mean mean score of observation included within the model, SD standard deviation of the mean.
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