Table 1

Comparison between participants in this study and all others enrolled in the Children's Respiratory Study (CRS)

		CRS participants included in this study (N=519)	All other CRS participants (N=727)	p Value
Sex	% Female	51.3	50.5	0.79
Ethnicity	% Non-Hispanic White	63.6	55.6	0.005
Wheezing phenotypes by age 6 years	% Never	49.4	53.8
Wheezing phenotypes by age 6 years	% Early transient	22.9	16.4
	% Late	15.2	14.8
	% Persistent	12.5	15.1	0.10
Skin prick tests YR11	% Positive	55.2	54.7	0.90
Skin prick tests YR16	% Positive	70.5	74.0	0.45
Active MD asthma YR11	% Positive	12.9	13.2	0.90
Active MD asthma YR16	% Positive	13.9	13.7	0.96
Maternal
Ever MD asthma	% Positive	10.0	11.8	0.33
Smoking	% Positive	14.6	19.9	0.02
Education	≤12 years	24.7	36.8	<0.001
Age at child's birth	Mean±SD	27.7±4.6	26.9±4.8	0.001
Paternal
Ever physician-confirmed asthma	% Positive	11.8	12.3	0.78
Smoking	% Positive	26.8	34.8	0.003
Education	≤12 years	24.9	33.1	0.002
Age at child's birth	mean±SD	30.1±6.0	29.3±5.5	0.02