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. 2023 Feb 21;63(1):18–29. doi: 10.5334/pb.1160

Table 2.

Sex Differences in ISI Scores and Sleep Parameters (Second Wave).


TOTAL (M, SD) MALE (M, SD) FEMALE (M, SD) T(DF) P D

ISI pre 6.14 (5.05) 5.79 (5.12) 6.31 (5.02) –2.19 (2098) .03 –0.10

ISI peri 10.30 (6.54) 10.05 (6.80) 10.41 (6.41) –1.26 (2398) .21 –0.10

BT pre 22:58 (1:07) 23:09 (1:13) 22:53 (1:04) 5.05 (2098) <.001 0.24

BT peri 23:06 (1:20) 23:14 (1:19) 23:02 (1:20) 3.56 (2397) <.001 0.16

RT pre 7:04 (1:19) 6:59 (1:22) 7:06 (1:18) –1.78 (2095) .08 –0.08

RT peri 7:17 (1:32) 7:10 (1:30) 7:20 (1:33) –2.51 (2395) .01 –0.11

TST pre 7:14 (1:03) 7:04 (1:03) 7:19 (1:03) –4.95 (2098) <.001 –0.23

TST peri 6:52 (1:19) 6:43 (1:19) 6:57 (1:19) –4.16 (2397) <.001 –0.18

TIB pre 8:06 (1:05) 7:50 (1:08) 8:13 (1:02) –7.40 (2095) <.001 –0.35

TIB peri 8:10 (1:13) 7:55 (1:15) 8:18 (1:11) –7.03 (2393) <.001 –0.31

SOL pre 0:21 (0:19) 0:19 (0:18) 0:21 (0:20) –2.18 (2098) .03 –0.10

SOL peri 0:31 (0:31) 0:29 (0:29) 0:32 (0:31) –2.54 (2398) .01 –0.11

SE pre 89.35 (9.61) 90.06 (9.82) 89.05 (9.47) 2.24 (2094) .03 0.11

SE peri 84.28 (12.76) 84.93 (13.05) 84.01 (12.58) 1.65 (2393) .10 0.07

Note: pre = pre-lockdown; peri = peri-lockdown; ISI = Insomnia Severity Index; BT = bedtime; RT = rise time; TST = total sleep time; TIB = time in bed; SOL = sleep onset latency; SE = sleep efficiency.