Table 2 Adjusted fixed effects for level-1 and level-2 covariates on continuous term birth weight

Maternal age

-16.9 (-19.3 – -14.4)

-14.9 (-17.4 – -12.4)

Nulliparous

-107.7 (-112.5 – -103.0)

-105.5 (-110.3 – -100.7)

Drug/Alcohol flag

-171.6 (-186.9 – -156.3)

-172.2 (-187.5 – -157.0)

Cigarettes/day

-23.5 (-25.8 – -21.2)

-26.2 (-28.5 – -23.9)

 cigarettes/day^a

0.66 (0.51 – 0.80)

0.75 (0.61 – 0.90)

Fall/Winter season

-9.6 (-14.1 – -5.0)

-8.8 (-13.3 – -4.3)

SESi

–

42.7 (39.8 – 45.6)

Education

–

6.3 (3.5 – 9.1)

Immigrant density

–

-35.8 (-38.5 – -33.2)

Rural address

–

-18.8 (-28.4 – -9.2)

PM_2.5

–

-25.0 (-28.2 – -21.8)

 PM_2.5 ^a

–

3.3 (1.5 – 5.2)