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Table 4 Sensitivity analysis using only term birth and excluding stillbirths and congenital anomalies (N = 207,405)

From: The reduction of birth weight by fine particulate matter and its modification by maternal and neighbourhood-level factors: a multilevel analysis in British Columbia, Canada

Variables

Main effect

Modification by PM2.5

β (95 % CI)

β (95 % CI)

PM2.5 a

-24.1 (-26.9 – -21.2)

5.0 (3.2 – 6.8)

Cigarettes/daya

-21.9 (-23.8 – -20.0)

2.8 (2.2 – 3.4)

Drug/Alcohol flag

-80.1 (-93.6 – -66.6)

13.2 (1.2 – 25.2)

Maternal age

-3.1 (-5.2 – -1.1)

5.0 (3.1 – 6.9)

Gestational diabetes

60.2 (52.1 – 68.4)

-30.7 (-39.2 – -22.1)

SESi

30.5 (27.9 – 33.1)

4.3 (1.5 – 7.0)

Immigrant density

-36.0 (-38.7 – -33.3)

6.9 (3.8 – 9.9)

Rural address

-31.2 (-41.6 – -20.8)

-16.9 (-25.3 – -8.5)

  1. aModeled as a quadratic, Cigarettes/day quadratic term: 0.7(0.6 – 0.8); Model adjusted for gestational age, nulliparous, diabetes mellitus, gestational hypertension, prenatal care visits, season of birth, DA-level education