Table 3.
Characteristics of the study participants at the three time points ISAAC II, SOLAR I and SOLAR II (N = 121)
| Variables | ISAAC II | SOLAR I | SOLAR II |
|---|---|---|---|
| Age, mean (sda) | 9.6 (0.56) | 17.0 (0.59) | 22.3 (0.69) |
| NAs | 0 | 0 | 0 |
| Asthma symptoms, N (%) | |||
| Yes | 116 (95.9) | 80 (66.1) | 79 (65.3) |
| NAsb | 0 | 2 (1.7) | 1 (0.8) |
| Control medication, N (%) | |||
| Yes | 67 (55.4) | 18 (14.9) | n.m.c |
| NAs | 11 (9.1) | 4 (3.3) | |
| Only reliever medication | |||
| Yes | 19 (15.7) | 30 (24.8) | n.m. |
| NAs | 11 (9.1) | 4 (3.3) | |
| No asthma medication intake at all | |||
| Yes | 24 (19.8) | 69 (57.0) | n.m. |
| NAs | 11 (9.1) | 4 (3.3) | |
| Study center, N (%) | |||
| Munich | 68 (56.2) | ||
| NAs | 0 | ||
| Sex | |||
| Male | 80 (66.1) | ||
| NAs | 0 | ||
| SESd parents, N (%) | |||
| High | 63 (52.1) | ||
| NAs | 1 (0.8) | ||
| Asthma history of parentse, N (%) | |||
| Yes | 25 (20.7) | ||
| NAs | 13 (10.7) | ||
| Passive smokingf, N (%) | |||
| Yes | 32 (26.4) | 58 (47.9) | 55 (45.5) |
| NAs | 3 (2.5) | 1 (0.8) | 1 (0.8) |
| Current smokerg, N (%) | |||
| Yes | n.m. | 38 (31.4) | 46 (38.0) |
| NAs | 0 | 0 | |
| Physical activityh, N (%) | |||
| Yes | n.m. | 96 (79.3) | 72 (59.5) |
| NAs | 1 (0.8) | 0 | |
| Overweighti | |||
| yes | n.m. | 11 (9.1) | 28 (23.1) |
| NAs | 2 (1.7) | 0 | |
| Current hay feverj, N (%) | |||
| Yes | 32 (26.4) | 37 (30.6) | 33 (27.3) |
| NAs | 0 | 1 (0.8) | 1 (0.8) |
Abbreviations and comments. aSd standard deviation, bNAs missing values, cn.m. not measured, dSES socio-economic status (high if one parent has at least higher secondary education or university degree); eYes if at least one parent has ever had asthma; fISAAC II: passive smoking of child if parents are current smokers, SOLAR I/SOLAR II: Yes if exposition to passive smoke per day > 0,5 h; gCurrent smoker = smoked ever for 1 year and smoked in the last month; hYes if participant reports doing sport at least once per week; iYes if body mass index > = 25; jYes if ever diagnosed hay fever by a doctor and itchy eyes and runny nose without cold in the last 12 months