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. Author manuscript; available in PMC: 2015 Apr 14.
Published in final edited form as: Drug Alcohol Depend. 2013 Nov 17;134:343–347. doi: 10.1016/j.drugalcdep.2013.11.007

TABLE 2.

PSG sleep measurements and sleep quality among all CD participants and subset with positive urine upon admission

All Participants Cocaine(+) at Admission Healthy Comparison Data
Week 1 Week 2 p Week 1 Week 2 p
Days Abstinent 6.8 (0.7) 5.2 (0.2)
TST 392 (11) 342 (14) 0.004 399 (12) 327 (19) 0.002 416 (15)
 N1 28 (4) 34 (6) >0.1 29 (6) 31 (5) >0.1 242 (12)*
 N2 225 (9) 191 (10) 0.003 226 (12) 192 (14) 0.02
 N3 40 (8) 39 (5) >0.1 47 (12) 34 (11) 0.10 85 (14)
 REM 99 (8) 82 (6) 0.08 97 (11) 69 (6) 0.04 87 (5)
Sleep Latency 18 (4) 22 (4) >0.1 16 (4) 23 (5) >0.1 14 (2)
REM Latency 35 (6) 61 (10) 0.04 32 (8) 64 (12) 0.02 73 (8)
Subjective Sleep Quality (0–100) 74 (3) 82 (4) 0.01 77 (4) 85 (4) 0.05 67 (6)
*

includes N1 and N2 sleep time

All values given in minutes (s.e.m.) except for subjective sleep quality