Table 2 Changes in variability of peak expiratory flow rate (PEFR).
| Group | Baseline | Change 0–6 months | Difference (95% CI)* | Change 0–12 months | Difference (95% CI)* | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Mean | SD | N | Mean | SD | N | Mean | SD | |||
| CV of morning PEFR | |||||||||||
| Intervention | 107 | 7.85 | 5.75 | 41 | −0.42 | 4.44 | 1.59 (−0.40 to 3.58) | 82 | −1.62 | 6.47 | 0.46 (−1.58 to 2.50) |
| Control | 104 | 8.55 | 5.23 | 43 | −2.01 | 4.71 | 66 | −2.08 | 5.96 | ||
| CV of evening PEFR | |||||||||||
| Intervention | 107 | 7.00 | 5.09 | 41 | −1.59 | 4.61 | 0.21 (−1.90 to 2.31) | 82 | −1.30 | 6.04 | 1.42 (−0.58 to 3.43) |
| Control | 104 | 8.04 | 5.67 | 42 | −1.80 | 5.02 | 67 | −2.72 | 6.30 | ||
CV, coefficient of variation.
*Difference = change in intervention group minus change in control group.