Table 2.
Prevalence of wheezing at 11 years old and at 15 years old, incident wheezing and persistent wheezing according with weight status and skinfolds. The 1993 Pelotas (Brazil) Birth Cohort Study
| N (%) | Prevalence of wheezing at 11 years (2004) (IC95%) | Prevalence of wheezing at 15 years (2008) (IC95%) | Incident wheezing 11–15 years (IC95%) | Persistent wheezing 11–15 years (IC95%) | |
|---|---|---|---|---|---|
| Occurrences | 13.5 (12.5; 14.5) | 12.1 (11.1; 13.1) | 8.7 (7.8; 9.6) | 33.4 (29.5; 37.3) | |
| Weight status at 11 years old | 4,441 | .003a | .042a | .826a | .009a |
| Normal | 3,080 (69.3) | 12.6 (11.4; 13.8) | 11.6 (10.5; 12.8) | 8.8 (7.7; 9.9) | 30.4 (25.6; 30.1) |
| Overweight | 888 (20.0) | 13.9 (11.6; 16.2) | 11.6 (9.4; 13.7) | 7.9 (6.0; 9.9) | 34.5 (25.8; 43.1) |
| Obese | 473 (10.7) | 17.8 (14.3; 21.3) | 15.7 (12.4; 19.1) | 9.1 (6.2; 12.0) | 45.8 (34.8; 56.7) |
| Sum of skinfolds at 11 years old (tertile) | 4,424 | .207a | .053a | .611a | .023a |
| First | 1,485 (33.6) | 13.4 (11.7; 15,1) | 11.0 (9.4; 12.6) | 8.0 (6.5; 9.5) | 29.7 (23.2; 32.2) |
| Second | 1,465 (33.1) | 11.9 (10.2; 13.6) | 12.0 (10.3; 13.7) | 9.6 (7.9; 11.3) | 29.1 (22.1; 36.1) |
| Third | 1,474 (33.3) | 15.0 (13.2; 16.8) | 13.4 (11.6; 15.2) | 8.6 (7.0; 10.2) | 40.2 (33.6; 46.8) |
| Obesity trajectory from 11 to 15 years old | 4,032 | .026b | .071b | .792b | .066b |
| No–No | 3,498 (86.8) | 13.2 (12.0; 14.3) | 11.6 (10.5; 12.7) | 8.6 (7.6; 9.6) | 31.4 (27.1; 35.6) |
| Yes–No | 181 (4.5) | 19.9 (14.0; 25.8) | 16.1 (10.7; 21.5) | 9.7 (4.8; 14.6) | 41.7 (24.8; 58.6) |
| No–Yes | 102 (2.5) | 12.7 (6.2; 19.3) | 12.8 (6.2; 19.3) | 11.2 (4.6; 17.9) | 23.1 (-3.4; 49.6) |
| Yes–Yes | 251 (6.2) | 17.1 (12.4; 21.8) | 15.9 (11.4; 20.5) | 9.1 (5.2; 13.1) | 48.8 (33.3; 64.4) |
| Skinfolds trajectory from 11 to 15 years old | 4,030 | .046b | .229b | .894b | .028b |
| Ever in the lowest tertile | 923 (22.9) | 13.8 (11.5; 16.0) | 11.5 (9.4; 13.5) | 8.2 (6.3; 10.1) | 32.3 (24.0; 40.5) |
| Reduction of tertile | 754 (18.7) | 16.1 (13.5; 18.7) | 13.0 (10.6; 15.4) | 8.7 (6.5; 10.9) | 33.9 (25.3; 42.4) |
| Ever in the middle tertile | 650 (16.1) | 11.5 (9.0; 13.9) | 10.9 (8.5; 13.3) | 8.2 (6.0; 10.5) | 32.4 (21.5; 43.4) |
| Increase of tertile | 769 (19.1) | 11.9 (9.6; 14.2) | 10.9 (8.7; 13.2) | 9.5 (7.3; 11.7) | 20.9 (12.4. 29.4) |
| Ever in the highest tertile | 934 (23.3) | 14.9 (12.6; 17.2) | 13.9 (11.7; 16.1) | 9.1 (7.1; 11.1) | 41.7 (33.4; 50.0) |
a
Test for linear trend.
b
Test for heterogeneity.