Table 2.
Baseline characteristics of the study population and results of univariate analyses of the possible confounders in relation to Cito-test scores
| Never users M ± SD | Current users M ± SD | Subgroups p value | interaction p value | |
|---|---|---|---|---|
| Total | 534.71 ± 9.47 | 532.80 ± 9.44 | <0.001*** | |
| Sex | .020* | |||
| Boys | 535.25 ± 9.42 | 533.60 ± 9.26 | 0.004** | |
| Girls | 534.27 ± 9.49 | 529.75 ± 9.55 | <0.001*** | |
| Ethnicity | .296 | |||
| Dutch | 535.09 ± 9.33 | 532.82 ± 9.41 | <0.001*** | |
| Non-Dutch | 531.97 ± 10.0 | 532.37 ± 10.27 | .86 | |
| Parent Household | .762 | |||
| Two-parent household | 535.18 ± 9.40 | 533.20 ± 9.42 | <0.001*** | |
| Single-parent household | 532.55 ± 9.49 | 531.07 ± 9.42 | .20 | |
| Household income | .101 | |||
| Low | 532.31 ± 9.68 | 531.26 ± 9.21 | .17 | |
| Intermediate | 535.41 ± 9.11 | 533.70 ± 9.50 | 0.019* | |
| High | 539.20 ± 7.81 | 535.63 ± 9.27 | 0.005** | |
| Treated concurrently with | ||||
| Asthma medication | 537.10 ± 8.52 | 535.64 ± 8.94 | .591 | |
Abbreviations: n, sample size; M, mean; SD, standard deviation
*Significant at .05 level**Significant at the 0.01 level
***Significant at the 0.001 level