Table 2.

Baseline Characteristics of Participants in RSV-LRI Group Compared with Those in No RSV-LRI Group

Participant Characteristics	RSV-LRI (n = 162*)	No RSV-LRI (n = 520*)	P Value†
Male	54.3	46.7	0.09
Ethnicity (non-Hispanic white)	63.0	63.5	0.91
Skin test positivity at age 6 yr	33.8 (n = 136)	40.7 (n = 425)	0.15
Active smoking at ages 22–26 yr	40.7 (n = 140)	35.1 (n = 464)	0.23
Maternal characteristics
Asthma	12.5 (n = 160)	9.7 (n = 514)	0.32
Smoking at enrollment	14.2	14.0	0.96
Education (>12 yr)	74.1	76.1 (n = 519)	0.60
Age (>28 yr)	39.5	41.5	0.65
Paternal characteristics
Asthma	13.7 (n = 153)	13.4 (n = 494)	0.91
Smoking at enrollment	29.1 (n = 158)	27.6 (n = 515)	0.71
Education (>12 yr)	76.4 (n = 157)	76.1 (n = 511)	0.94
Age (>28 yr)	62.4 (n = 157)	59.7 (n = 514)	0.55

Definition of abbreviations: LRI = lower respiratory illness; RSV = respiratory syncytial virus.

Data are presented as %.

^*Unless otherwise specified.

^†P values based on chi-square statistic.