Table 2.
Bivariate relationships between nocturia frequency and sleep quality, wake after sleep onset (WASO), total sleep time (TST), and time-in-bed (TIB) for cases with both nocturia frequency and actigraphy data (N=826)
| Variable | Total | Void 0/night N(%) or mean (SD) | Void 1–2/night N(%) or mean (SD) | Void 3–4/night N(%) or mean (SD) | χ2 (df, N) or F(df), p value |
|---|---|---|---|---|---|
| Self-reported sleep quality | 826 | 111 (13.4%) | 500 (60.5%) | 215 (26.0%) | χ2 (2, 826)=20.2, p<.001 |
| Good (very or fairly good) | 690 | 102 (91.9%) | 428 (85.6%) | 160 (74.4%) | |
| Poor (very or fairly bad) | 136 | 9 (8.1%) | 72 (14.4%) | 55 (25.6%) | |
| Actigraphy-measured wake after sleep onset (minutes) | 824 | 55.5 (41.7) | 70.6 (46.3) | 89.8 (49.5) | F(2, 821)=22.4, p<.001 |
| Actigraphy-measured total sleep time (minutes) | 825 | 435.5 (79.8) | 423.0 (82.5) | 430.5 (81.1) | F(2, 822)=1.38, p=.252 |
| Actigraphy-measured time- in-bed (minutes) | 826 | 517.8 (83.8) | 524.8 (69.6) | 553.7 (76.0) | F(2,823)= 13.85, p=.024 |