Table 2.
Variation in, and absolute stable Heart Rate, Oxygen Saturation and peak-expiratory flow (PEF) by patient and COPD disease characteristics; n = 31.
| Age1 | Sex F vs. M2 | Current Smoker vs. Not2 | FEV1 (% predicted)1 | Exacerbation Frequency (previous yr)3 | |
|---|---|---|---|---|---|
| Mean Heart Rate (min-1) | r = -0.28 | 80 vs. 77 | 77 vs. 78 | r = -0.26 | rho = 0.23 |
| p = 0.134 | p = 0.525 | p = 0.862 | p = 0.164 | p = 0.207 | |
| SD Heart Rate (min-1) | r = -0.39 | 4.7 vs. 5.0 | 4.5 vs. 4.9 | r = -0.35 | rho = -0.05 |
| p = 0.030* | p = 0.724 | p = 0.713 | p = 0.054 | p = 0.797 | |
| Mean Oxygen Saturation (%) | r = 0.08 | 94 vs. 95 | 95 vs. 95 | r = 0.14 | rho = 0.21 |
| p = 0.688 | p = 0.358 | p = 0.644 | p = 0.470 | p = 0.266 | |
| SD Oxygen Saturation (%) | r = 0.17 | 1.2 vs. 0.9 | 1.0 vs. 1.0 | r = -0.21 | rho = -0.03 |
| p = 0.350 | p = 0.027* | p = 0.769 | p = 0.267 | p = 0.862 | |
| Mean PEF (lmin-1) | r = -0.03 | 198 vs. 248 | 258 vs. 225 | r = 0.25 | rho = 0.09 |
| p = 0.858 | p = 0.085 | p = 0.378 | p = 0.172 | p = 0.647 | |
| SD PEF (lmin-1) | r = -0.02 | 12 vs. 11 | 10 vs. 12 | r = 0.10 | rho = 0.00 |
| p = 0.921 | p = 0.834 | p = 0.446 | p = 0.608 | p = 0.982 |
(Statistics: 1= Pearson correlation. 2= t test. 3= Spearman correlation).