Table 2.
Demographic characteristics, risk factors and lung function values and their differences between the children with or without wheezing in the last year.
| Total (142) |
Wheezing in Last Year: No (121) |
Wheezing in Last Year: Yes (21) |
p * | |
|---|---|---|---|---|
| Age (years) | 5.37 (1.64) | 5.47 (1.66) | 4.81 (1.47) | 0.09 |
| Number of episodes | 0.68 (0.82) | 0.41 (0.51) | 2.19 (0.6) | <0.001 |
| Gestational age | 27.77 (1.94) | 27.75 (1.94) | 27.86 (1.98) | 0.82 |
| Birthweight (g) | 1034.3 (309) | 1014.3 (295) | 1149.9 (366) | 0.06 |
| Birthweight (z-score) | −0.33 (0.73) | −0.37 (0.74) | -0.07 (0.62) | 0.07 |
| Corrected age at test (sem.) | 25.8 (15.7) | 25.6 (16.4) | 26.7 (11.1) | 0.77 |
| BPD (yes) | 88 (62%) | 72 (59.5%) | 16 (76.2%) | 0.15 |
| Invasive ventilation (yes) | 95 (66.9%) | 15 (71.4%) | 80 (66.1%) | 0.80 |
| Day-care attendance in first year | 71 (72.5%) | 54 (68.9%) | 17 (89.5%) | 0.06 |
| Male sex | 62 (63.3%) | 52 (65.8%) | 10 (52.6%) | 0.28 |
| Smoking during pregnancy | 15 (15.8%) | 11 (14.5%) | 4 (21.1%) | 0.49 |
| FVC (z-score) | −1.12 (0.57) | −1.11 (0.60) | −1.18 (0.39) | 0.6 |
| FEV0.5 (z-score) | −2.09 (0.87) | −2.04 (0.89) | −2.36 (0.72) | 0.12 |
| FEV0.5/FCV (z-score) | -0.45 (1.29) | −0.37 (1.30) | −0.89 (1.15) | 0.09 |
| FEF75 (z-score) | −1.47 (0.91) | −1.42 (0.90) | −1.79 (0.91) | 0.08 |
| FEF25-75 (z-score) | −1.54 (0.95) | −1.47 (0.95) | −1.93 (0.91) | 0.04 |
| Allergic mother (yes) | 15 (16.3) | 11 (14.9%) | 4 (22.2%) | 0.48 |
| Rehospitalisation due to respiratory causes | 36 (18.4%) | 29 (17.9%) | 8 (20.5%) | 0.71 |
Indicates number of cases (percentage) or mean media (SD). * Difference between the proportion of children with wheezing according to each risk factor.