Table 3.
Variable | PTSD (n = 40) - PI (n = 25) | PTSD (n = 40) - Control (n = 27) | PI (n = 25) - Control (n = 27) |
---|---|---|---|
Night-to-night variability | |||
sTST (m) | [1.08, 56.08]* | [58.69, 112.64]** | [25.10, 78.30]** |
sSL (m) | [−11.00, 18.15] | [17.05, 37.60]** | [15.24, 36.36]** |
sWASO (m) | [−0.10, 48.66] | [40.02, 78.58]** | [20.27, 44.88]** |
sSE (%) | [−0.66, 8.02] | [9.80, 15.52]** | [6.86, 12.31]** |
oTSTa (m) | [−15.41, 37.98] | [36.75, 83.40]** | [23.29, 69.10]** |
oWASOa (m) | [−13.36, 9.31] | [6.83, 22.44]* | [7.25, 26.33]* |
oSEa (%) | [1.86, 11.02]* | [8.32, 16.16]** | [0.97, 9.00]* |
Within-group variability | |||
sTST (m) | [2372.35, 9121.30]** | [3040.49, 9424.41]*** | [−903.42, 1874.68] |
sSL (m) | [−96.55,3182.70] | [623.59, 3786.76]** | [90.09, 1234.10]* |
sWASO (m) | [55.02,3171.75]* | [1662.96, 4197.87]*** | [361.32, 2272.73]** |
sSE (%) | [12.29, 241.15]* | [104.39, 309.54]*** | [42.14, 118.36]*** |
oTSTa (m) | [770.35, 6001.86]* | [2304.29, 6957.69]*** | [−25.18, 2514.95] |
oWASOa (m) | [−327.67, 636.86] | [−113.74, 730.26] | [−23.33, 330.66] |
oSEa (%) | [35.70, 121.34]*** | [45.14, 124.28]*** | [−14.46, 26.83] |
Note. Root mean squared successive difference was used as the index of night-to-night variability. 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; oTST = objective total sleep time, oWASO = objective wake after sleep onset; oSE = objective sleep efficiency.
For the objective variables, n = 25 for PTSD and control and n = 21 for PI.
p < .05
p < .01
p < .001