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Table 1: Clinical and demographic characteristics
Characteristic Overall (n = 175)^{^a} No Cardiorespiratory Event (n = 153)^{^a} Cardiorespiratory Event (n = 22)^{^a} P Value^{^b}
Female sex 96 (55%) 82 (54%) 14 (64%) .376
Age (m) 28.93 (23.21) 30.11 (24.17) 20.43 (11.76) .004
Weight (kg) 13.00 (10.00–15.65) 13.00 (9.90–16.00) 11.30 (10.00–14.50) .228
Bronchial hyperreactivity 19 (11%) 19 (12%) 0 (0%) .136
Rhinitis 1 (1%) 1 (1%) 0 (0%) >.999
Previous bronchiolitis 5 (3%) 5 (3%) 0 (0%) >.999
Upper respiratory tract infections <15 days 8 (5%) 8 (5%) 0 (0%) .598
Parental smoking 9 (5%) 7 (5%) 2 (9%) .315
No clinical history 137 (78%) 117 (76%) 20 (91%) .169
↵a Data are No. (%), mean (SD), median (25th–75th percentiles).
↵b Determined by the Pearson χ² test; Welch 2-sample t test; Fisher exact test; Wilcoxon rank-sum test.