Table 2.
Sleep parameters for each recording night
| Night one | Night two | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Sleep parameter | PSG | Act-Low | Act-Med | Act-High | Diary | PSG | Act-Low | Act-Med | Act-High | Diary |
| Sleep onset latency (min)a | ||||||||||
| Bipolar disorder | 12.6 (13.7) | 11.8 (14.4) | 11.8 (14.4) | 11.8 (14.4) | 27.5 (19.7) | 15.9 (17.9) | 12.8 (21.0) | 12.8 (21.0) | 12.8 (21.0) | 27.7 (27.4) |
| Controls | 10.8 (11.7) | 18.2 (28.0) | 18.2 (28.0) | 18.2 (28.0) | 24.4 (20.5) | 11.6 (13.4) | 10.0 (15.9) | 10.0 (15.9) | 10.0 (15.9) | 19.4 (18.4) |
| Wakefulness after sleep onset (min) | ||||||||||
| Bipolar disorder | 23.0 (18.0) | 46.8 (20.8) | 32.3 (17.1) | 23.2 (14.9) | 27.4 (25.8) | 32.3 (29.0) | 49.8 (25.3) | 33.3 (16.9) | 30.7 (11.6) | 30.1 (30.7) |
| Controls | 34.6 (26.6) | 50.3 (15.4) | 34.8 (13.1) | 23.3 (11.0) | 21.9 (20.6) | 25.7 (19.0) | 48.5 (15.4) | 33.2 (15.7) | 22.4 (11.8) | 23.1 (19.0) |
| No. of awakenings | ||||||||||
| Bipolar disorder | 16.8 (7.6) | 29.9 (13.4) | 25.0 (11.3) | 17.0 (7.4) | 2.6 (1.6) | 18.8 (8.7) | 30.7 (12.2) | 27.7 (12.8) | 22.0 (11.0) | 2.5 (1.6) |
| Controls | 18.0 (7.6) | 31.1 (12.1) | 27.2 (11.3) | 19.5 (8.6) | 2.9 (1.4) | 20.7 (8.4) | 30.4 (11.7) | 27.1 (10.8) | 20.7 (8.8) | 2.8 (1.4) |
| Total sleep time (min) | ||||||||||
| Bipolar disorder | 411.9 (85.2) |
412.0 (74.5) |
426.3 (76.4) |
435.4 (77.4) |
446.6 (84.3) | 426.8 (84.4) |
412.5 (87.8) |
429.1 (89.4) |
438.3 (95.1) |
409.8 (88.2) |
| Controls | 370.3 (74.7) |
373.3 (70.3) |
388.2 (71.9) |
400.2 (71.8) |
420.6 (69.6) | 380.5 (81.2) |
371.5 (77.9) |
387.7 (79.4) |
398.9 (82.0) |
408.4 (70.4) |
| Sleep efficiency (%) | ||||||||||
| Bipolar disorder | 92.4 (4.7) | 87.4 (5.1) | 90.4 (4.6) | 92.4 (4.3) | 88.9 (9.0) | 89.2 (8.7) | 86.1 (7.0) | 89.7 (5.9) | 91.9 (5.2) | 86.5 (11.8) |
| Controls | 89.4 (7.2) | 84.3 (7.2) | 87.7 (7.1) | 90.5 (6.8) | 89.7 (8.2) | 90.9 (5.9) | 86.2 (6.2) | 90.1 (5.5) | 92.7 (4.9) | 89.9 (6.9) |
Values are reported as mean (standard deviation). PSG = polysomnography; Act-Low = Actiware low threshold algorithm; Act-Med = Actiware medium threshold algorithm; Act-High = Actiware high threshold algorithm.
a
Sleep onset latency is calculated by a separate immobile minutes algorithm in Actiware and is unaffected by sensitivity thresholds.