Table 3.

Paired t-Test Results for Insomnia Symptoms

Variable	Pre-Lockdown (Mean, SD)	Peri-Lockdown (Mean, SD)	Change (%)	t test (df)	P value	Cohen d
ISI total	6.14 (5.05)	10.38 (6.55)	69,1	−33.31 (2102)	< 0.001	−0.73
DIS	1.78 (0.93)	2.25 (1.22)	26,4	−20.20 (2102)	< 0.001	−0.44
DMS	1.82 (0.97)	2.51 (1.27)	37,9	−27.62 (2102)	< 0.001	−0.60
EMA	1.80 (0.96)	2.43 (1.31)	35,0	−25.63 (2102)	< 0.001	−0.56
Dissatisfaction	2.56 (0.96)	3.31 (1.10)	29,3	−30.01 (2102)	< 0.001	−0.65
Interference	1.82 (0.94)	2.51 (1.2)	37,9	−28.57 (2102)	< 0.001	−0.62
Noticeability	1.64 (0.88)	2.12 (1.09)	29,3	−22.06 (2102)	< 0.001	−0.48
Worry	1.72 (0.95)	2.25 (1.14)	30,8	−23.31 (2102)	< 0.001	−0.51
Sleep quantity	3.37 (0.90)	2.98 (1.08)	−11,6	15.53 (2102)	< 0.001	−0.34
DSA	1.60 (0.80)	1.93 (1.01)	20,6	−16.94 (2102)	< 0.001	−0.37
Mental fatigue	2.42 (1.04)	3.25 (1.24)	34,3	−32.00 (2102)	< 0.001	−0.70
Physical fatigue	2.12 (0.99)	2.52 (1.21)	18,9	−16.58 (2102)	< 0.001	−0.36
Anxiety	1.92 (0.93)	2.65 (1.18)	38,0	−31.29 (2102)	< 0.001	−0.68
Depression	1.52 (0.86)	2.20 (1.19)	44,7	−29.90 (2102)	< 0.001	−0.65

Note: Scale going from 1 to 5, except for ISI total. Bold percentages in the column change signify a change of more than 30%.