Table 2.
Baseline PSQI According to Exacerbation Status During the 18-Month Follow-up Period
| PSQI Variable | All COPD (n = 480) |
|||||
|---|---|---|---|---|---|---|
| Symptom-based Exacerbation |
No Exacerbation |
P Value | Event-based Exacerbation |
No Exacerbation |
P Value | |
| (n = 185) | (n = 295) | (n = 139) | (n = 341) | |||
| Global PSQI Score (scale, 0-21), median (Q1, Q3) | 6.0 (3.0, 8.0) | 5.0 (2.0, 7.0) | .01a | 5.0 (3.0, 8.0) | 5.0 (3.0, 7.0) | .19 |
| Factor 1: Sleep Efficiency, median (Q1, Q3) | 0.5 (0.0, 1.5) | 0.5 (0.0, 1.0) | .07 | 0.5 (0.0, 1.5) | 0.5 (0.0, 1.0) | .27 |
| Factor 2: Sleep Quality, median (Q1, Q3) | 0.7 (0.3, 1.3) | 0.7 (0.3, 1.0) | .04a | 0.7 (0.3, 1.3) | 0.7 (0.3, 1.0) | .25 |
| Factor 3: Daily Disturbance, median (Q1, Q3) | 1.0 (0.5, 1.0) | 0.5 (0.5, 1.0) | < .001a | 1.0 (0.5, 1.0) | 1.0 (0.5, 1.0) | .03a |
| Poor sleeper (global PSQI score > 5), No. (%) | 93 (50.3) | 110 (37.3) | .01a | 62 (44.6) | 141 (41.3) | .51 |
| Diagnosed COPD (n = 141) |
||||||
|---|---|---|---|---|---|---|
| Symptom-based Exacerbation |
No Exacerbation |
P Value | Event-based Exacerbation |
No Exacerbation |
P Value | |
| (n = 76) | (n = 65) | (n = 66) | (n = 75) | |||
| Global PSQI Score (scale, 0-21), median (Q1, Q3) | 5.0 (3.0, 8.5) | 5.0 (3.0, 7.0) | .64 | 5.0 (3.0, 8.0) | 6.0 (4.0, 8.0) | .46 |
| Factor 1: Sleep Efficiency, median (Q1, Q3) | 0.5 (0.0, 1.5) | 0.5 (0.0, 1.0) | .29 | 0.5 (0.0, 1.5) | 0.5 (0.0, 1.0) | .5 |
| Factor 2: Sleep Quality, median (Q1, Q3) | 0.7 (0.3, 1.3) | 0.7 (0.3, 1.0) | .64 | 0.7 (0.3, 1.3) | 0.7 (0.3, 1.3) | .12 |
| Factor 3: Daily Disturbance, median (Q1, Q3) | 1.0 (0.5, 1.0) | 1.0 (0.5, 1.0) | .045a | 1.0 (0.5, 1.0) | 1.0 (0.5, 1.0) | .75 |
| Poor sleeper (global PSQI score > 5), No. (%) | 37 (48.7) | 32 (49.2) | .94 | 29 (43.9) | 40 (53.3) | .26 |
| Undiagnosed COPD (n = 339) |
||||||
|---|---|---|---|---|---|---|
| Symptom-based exacerbation |
No Exacerbation |
P Value | Event-based exacerbation |
No Exacerbation |
P Value | |
| (n = 109) | (n = 230) | (n = 73) | (n = 266) | |||
| Global PSQI Score (scale, 0-21), median (Q1, Q3) | 6.0 (3.0, 8.0) | 4.0 (2.0, 7.0) | .01a | 5.0 (3.0, 8.0) | 5.0 (2.0, 7.0) | .10 |
| Factor 1: Sleep Efficiency, median (Q1, Q3) | 0.5 (0.0, 1.5) | 0.5 (0.0, 1.0) | .20 | 0.5 (0.0, 1.5) | 0.5 (0.0, 1.0) | .51 |
| Factor 2: Sleep Quality, median (Q1, Q3) | 0.7 (0.3, 1.3) | 0.5 (0.0, 1.0) | .02a | 0.7 (0.3, 1.3) | 0.7 (0.3, 1.0) | .05 |
| Factor 3: Daily Disturbance, median (Q1, Q3) | 1.0 (0.5, 1.5) | 0.5 (0.5, 1.0) | < .001a | 1.0 (0.5, 1.0) | 0.5 (0.5, 1.0) | .08 |
| Poor sleeper (global PSQI score > 5), No. (%) | 56 (51.4) | 78 (33.9) | .001a | 33 (45.2) | 101 (38.0) | .26 |
Data are presented as median (interquartile range) or No. (%). Comparisons were conducted by using χ2 or Mann-Whitney U tests. See Table 1 legend for expansion of abbreviation.
a
Statistically significant at P < .05.