Table 2.
Variable | PTSD (n = 45) |
PI (n = 25) |
Control (n = 27) |
PTSD vs. PI |
PTSD vs. Control |
PI vs. Control |
||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
M | SD | M | SD | M | SD | U | r | U | R | U | r | |
sTSTa | 338.85 | 87.57 | 351.10 | 43.83 | 475.56 | 37.89 | 423.0 | .13 | 101.0* | .69 | 4.0* | .85 |
sSLa | 50.29 | 47.47 | 44.17 | 26.65 | 12.35 | 6.93 | 462.5 | .06 | 128.5* | .64 | 48.0* | .74 |
sWASOa | 73.69 | 54.58 | 50.06 | 36.96 | 7.03 | 6.98 | 367.0 | .22 | 34.5* | .79 | 47.0* | .74 |
sSEa | 73.98 | 14.57 | 79.26 | 9.25 | 95.76 | 2.29 | 400.0 | .17 | 32.0* | .79 | 13.0* | .82 |
oTIBb | 513.63 | 85.13 | 474.39 | 62.73 | 505.05 | 27.96 | 244.0 | .21 | 338.0 | .03 | 198.0 | .27 |
oTSTb | 369.85 | 77.33 | 390.29 | 50.93 | 435.44 | 36.73 | 247.5 | .20 | 167.0* | .45 | 139.5* | .45 |
oWASOb | 50.43 | 22.14 | 54.10 | 18.32 | 41.48 | 13.48 | 253.5 | .16 | 250.5 | .22 | 175.0 | .34 |
oSEb | 72.49 | 10.29 | 82.48 | 5.22 | 86.21 | 4.60 | 120.0* | .54 | 73.0* | .68 | 166.0* | .36 |
ISIc | 18.73 | 4.36 | 16.76 | 3.03 | 0.57 | 0.76 | 389.5 | .25 | 0.0* | .73 | 0.0* | .83 |
PSQI | 14.11 | 3.21 | 11.36 | 2.20 | 2.19 | 1.36 | 272.0* | .43 | 0.0* | .84 | 0.0* | .86 |
Note. PTSD = posttraumatic stress disorder; PI = primary insomnia; sTST = subjective total sleep time; sSL = subjective sleep latency; sWASO = subjective wake after sleep onset; sSE = subjective sleep efficiency; oTIB = objective time in bed, oTST = objective total sleep time, oWASO = objective wake after sleep onset; oSE = objective sleep efficiency; ISI = Insomnia Severity Index; PSQI = Pittsburgh Sleep Quality Index.
For the subjective variables, n = 40 for PTSD, n = 27 for control and n = 25 for PI.
For the objective variables, n = 25 for PTSD and control and n = 21 for PI.
For the ISI, n = 45 for PTSD, n = 25 for PI, and n = 14 for controls.
p < Bonferroni-corrected alpha .05/3 = .017.