Journal of Pregnancy / 2010 / Article / Tab 1

Research Article

Antenatal Steroid Therapy for Fetal Lung Maturation and the Subsequent Risk of Childhood Asthma: A Longitudinal Analysis

Table 1

Descriptive characteristics of the study sample by asthma status.

Asthma
NoYesTotal
%%
NumRowColumnNumRowColumnNum%*

Total59,97574.6100.020,47325.4100.080,448100.0

Birth year
 19893,82365.16.42,05134.910.05,8747.3
 19905,81666.59.72,93133.514.38,74710.9
 19915,67167.29.52,77332.813.58,44410.5
 19926,02071.710.02,37428.311.68,39410.4
 19936,13574.010.22,15226.010.58,28710.3
 19946,52475.910.92,06724.110.18,59110.7
 19956,50377.410.81,89622.69.38,39910.4
 19966,79380.711.31,62919.38.08,42210.5
 19976,46581.810.81,44018.27.07,9059.8
 19986,22584.310.41,16015.75.77,3859.2

Antenatal steroid exposure 77368.11.336231.91.81,1351.4

Number of siblings
 025,91672.243.29,97227.848.735,88844.6
 121,75375.136.37,19924.935.228,95236.0
 28,69178.114.52,43521.911.911,12613.8
 3+3,60880.76.086419.34.24,4725.6

Preterm birth (<37 weeks) 2,53468.14.21,18931.95.83,7234.6

Caesarean section 10,87371.918.14,25328.120.815,12618.8

Income
 Quintile 112,69373.621.54,54726.422.717,24021.4
 Quintile 212,61974.321.44,35925.721.716,97821.1
 Quintile 311,36875.219.33,74924.818.715,11718.8
 Quintile 412,43574.621.14,23525.421.116,67020.7
 Quintile 59,87375.716.73,17424.315.813,04716.2

Surfactant administration 13959.90.29340.10.52320.3

1 Minute Apgar score
 0–31,30970.42.255029.62.71,8592.3
 4–64,37571.97.31,71228.18.46,0877.6
 7–1054,07074.990.518,13725.188.972,20789.8

Maternal smoking 16,42172.627.46,21127.430.322,63228.1
Married/Common law 42,67174.671.114,56625.471.157,23771.1
Hyaline membrane disease 67262.31.140637.72.01,0781.3
Bronchopulmonary dysplasia 9754.20.28245.80.41790.2
Duration: weeks (mean, SD) 512.3155.3287.2116.6455.0176.2
Birth weight: grams (mean, SD) 3,487.4554.73,444.3592.13,476.5564.7
Gestational age: weeks (mean, SD) 39.51.739.31.939.41.7
Maternal age: years (mean, SD) 26.75.326.45.226.65.3

Note: All totals do not add to grand total given missing values for some variables.
*Percent of total cohort.

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