Table 2 Pearson’s correlation coefficients: weekly mean rescue medication doses and weekly mean night-time awakening scores
From: Effect of tiotropium on night-time awakening and daily rescue medication use in patients with COPD
Rescue medication correlation with night-time awakening | Tiotropium | Placebo | ||
|---|---|---|---|---|
n | r | n | r | |
24 h | ||||
Baseline | 544 | 0.30*** | 357 | 0.34*** |
Overall (Weeks 1–13) | 543 | 0.41*** | 352 | 0.39*** |
6 pm to 6 am | ||||
Baseline | 544 | 0.39*** | 357 | 0.40*** |
Overall (Weeks 1–13) | 543 | 0.48*** | 352 | 0.51*** |
6 pm to midnight (12 am) | ||||
Baseline | 544 | 0.24*** | 357 | 0.26*** |
Overall (Weeks 1–13) | 543 | 0.34*** | 352 | 0.31*** |
Midnight (12 am) to 6 am | ||||
Baseline | 544 | 0.47*** | 357 | 0.43*** |
Overall (Weeks 1–13) | 543 | 0.55*** | 352 | 0.61*** |
6 am to 6 pm | ||||
Baseline | 544 | 0.20*** | 357 | 0.25*** |
Overall (Weeks 1–13) | 543 | 0.32*** | 352 | 0.26*** |