Table 1 Baseline characteristics of participants
Characteristics | All | Without severe restriction | With severe restriction | |
|---|---|---|---|---|
(n = 64) | (n = 41) | (n = 23) | ||
Continuous variables | Mean (SD) | Mean (SD) | Mean (SD) | P Value |
Age, months | 9.9 (3.1) | 9.7 (3.1) | 10.4 (3.1) | 0.38 a |
Birth weight, g | 3373 (554) | 3410 (476) | 3307 (677) | 0.48 a |
Gestational age, weeks | 39.6 (1.8) | 40.0 (1.4) | 39.0 (2.3) | 0.07 a |
Categorical variables | Frequency (%) | Frequency (%) | Frequency (%) | P Value |
Gender (Boy) | 35 (54.7) | 23 (56.1) | 12 (52.2) | 0.76 b |
Use of pacifier (Yes) | 46 (71.9) | 30 (73.2) | 16 (69.6) | 0.76 b |
Daycare attendance (Yes) | 43 (67.2) | 27 (65.9) | 16 (69.6) | 0.76 b |
Siblings (Yes) | 28 (43.8) | 19 (46.3) | 9 (39.1) | 0.58 b |
Low socioeconomic status (< $30,000/year) | 13 (20.3) | 8 (19.5) | 5 (21.7) | 1.00 c |
Breastfeeding ≥ 6 months (Yes) | 43 (67.2) | 29 (70.7) | 14 (60.9) | 0.42 b |
Parental smoking (Yes) | 16 (25.0) | 7 (17.1) | 9 (39.1) | 0.05 c |
History of URTI (Yes) | 11 (17.2) | 7 (17.1) | 4 (17.4) | 1.00 c |
Bronchiolitis | 7 (10.9) | 4 (9.8) | 3 (13.0) | 0.70 c |
Sinusitis | 2 (3.1) | 1 (2.4) | 1 (4.3) | 1.00 c |
Pneumonia | 3 (4.7) | 3 (7.1) | 0 (0) | 0.55 c |