The effect of the text message intervention on asthma control and quality of life at the end of follow-up and on the frequency of asthma exacerbations
| Intervention | Control | Difference (95% CI) | p-value | |
| Subjects | 101 | 108 | ||
| c-ACT# score | 21.10 | 22.17 | −1.07 (−3.51–0.56) | 0.203 |
| PAQLQ¶ score | 6.19 | 6.25 | −0.06 (−0.41–0.15) | 0.659 |
| Asthma exacerbations+ per year | 0.23 | 0.37 | −0.14 (−0.61–0.25) | 0.432 |
The differences and p-values with regards to the childhood asthma control test (c-ACT) and paediatric asthma quality of life questionnaire (PAQLQ) presented in this table are the effect estimates and their p-values from the multilevel regression models for month 12. The confidence intervals were the results of bootstrapping procedures. #: seven-item questionnaire for detecting poorly controlled asthma in children aged 4–11 years [18]; range: 0–27 points; cut-off score: 19 points (≤19 points: uncontrolled asthma, ≥20 points: controlled asthma). ¶: 23-item questionnaire [20]; domains include activities, asthma symptoms and emotional function; range: 1–7. +: defined as an asthma-related hospitalisation, a visit to the emergency department or an episode of systemic corticosteroid use [5]. The p-value was taken from the negative binomial regression model.