|
Variable
|
Mean (sd)
|
Min-max
|
|---|
|
Level-1 (individual)
|
|
Maternal age
|
29.8 (5.60)
|
11 – 55
|
|
Nulliparous
|
0.45 (0.50)
|
0 – 1
|
|
Drug/Alcohol flag
|
0.02 (0.15)
|
0 – 1
|
|
Cigarettes/day
|
0.79 (2.91)
|
0 – 20
|
|
Fall/Winter season
|
0.48 (0.50)
|
0 – 1
|
|
Level-2 (DA) Variables
|
|
SESi
|
-0.08 (0.58)
|
-2.22 – 1.18
|
|
Education
|
0.50 (0.12)
|
0 – 0.95
|
|
Immigrant density
|
0.16 (0.19)
|
0 – 0.86
|
|
PM2.5
|
7.30 (0.86)
|
4.41 – 10.23
|
|
Rural address
|
0.11 (0.32)
|
0 – 1
|
- # values shown are unstandardized, non-centered; Nulliparous: patient has never delivered a baby of at least 500 g birth weight or at least 20 weeks gestation in a previous pregnancy; Drug or Alcohol Flag: physician indicated use of drugs (prescription, non-prescription, illicit) or alcohol as risk factor in pregnancy; Cigarettes/day: number of cigarettes smoked daily at 1st prenatal visit (self-reported); Fall/Winter Season: month or birth between September to February; SESi: socioeconomic status index; Education: proportion of population over 15 with any post-secondary education (trade, college, university); Immigrant Density: proportion of the population identified as immigrant status from continental Asia; PM2.5: Particulate Matter less than 2.5 μm; Rural: those having a rural residential address
