Table 2.
Polysomnographic assessments of sleep control versus all cocaine-dependent (COC) participants data are displayed as mean (Standard Deviation).
| Sig. | Baseline | Sig. | Recovery | Sig. | |||
|---|---|---|---|---|---|---|---|
| Control | COC | Control | COC | ||||
| Sleep onset latency (mins.) | 23.3 (6.4) | 34.3 (20.4) | 10.5 (18.5) | 4.6 (2.6) | ∗ | ||
| Waking after sleep onset (mins.) | 54.9 (18.5) | 66.5 (32.2) | 14.7 (2.5) | 33.0 (9.3) | ∗ | ||
| Sleep efficiency index | 81.8 (4.3) | 79.1 (5.2) | 94.5 (1.2) | 91.8 (1.8) | ∗ | ||
| Total sleep time (hrs.) | 6.3 (0.3) | 6.3 (0.4) | 7.4 (0.2) | 7.4 (0.1) | ∗ | ||
| Number of arousals | ‡ | 88.9 (10.1) | 54.5 (6.5) | 78.2 (8.9) | 56.0 (7.2) | ||
| Arousal index | 14.5 (2.0) | 16.9 (7.8) | 10.4 (1.3) | 7.1 (1.0) | |||
| Stage 1 (mins.) | 49.1 (8.6) | 42.5 (3.4) | 41.4 (8.0) | 30.7 (5.1) | |||
| Stage 2 (mins.) | 214.5 (12.7) | 238.1 (19.1) | 251.8 (11.5) | 259.4 (7.8) | ∗ | ||
| Stage 3 (mins.) | 27.7 (7.5) | 16.7 (7.0) | 32.7 (11.9) | 18.3 (6.7) | |||
| Stage 4 (mins.) | 8.5 (4.4) | 7.2 (4.0) | 16.9 (6.9) | 12.9 (8.5) | |||
| REM (mins.) | 79.4 (8.8) | 74.3 (8.7) | 101.3 (5.7) | 121.8 (9.2) | ∗ | ||
| Slow wave sleep (mins.) | 132.9 (34.6) | 95.7 (36.5) | 216.0 (50.6) | 143.2 (57.6) | |||
Significance (Sig.): *sleep night P < 0.05; ‡group P < 0.05.