Table 2.

The correlation coefficients between the change in the volume of online activities of each hour in a day and deteriorating PHQ-9 and GAD-7 scores.

Hour	Deteriorating PHQ-9a		Deteriorating GAD-7b
	Correlation coefficient, r (95% CI)	P value		Correlation coefficient, r (95% CI)	P value
12 AM	0.54c (0.38 to 0.72)	<.001		0.45 (0.20 to 0.65)	.001
1 AM	0.64 (0.45 to 0.81)	<.001		0.52 (0.28 to 0.70)	<.001
2 AM	0.66 (0.47 to 0.85)	<.001		0.60 (0.39 to 0.75)	<.001
3 AM	0.75 (0.59 to 0.94)	<.001		0.74 (0.58 to 0.92)	<.001
4 AM	0.63 (0.43 to 0.80)	<.001		0.63 (0.43 to 0.77)	<.001
5 AM	0.45 (0.29 to 0.65)	.001		0.58 (0.35 to 0.74)	<.001
6 AM	0.34 (0.21 to 0.54)	.02		0.39 (0.12 to 0.60)	.006
7 AM	0.27 (0.01 to 0.54)	.06		0.24 (–0.05 to 0.48)	.10
8 AM	–0.26 (–0.50 to 0.02)	.07		–0.28 (–0.52 to 0.00)	.05
9 AM	–0.28 (–0.52 to 0.00)	.05		–0.26 (–0.50 to 0.02)	.07
10 AM	–0.27 (–0.51 to 0.01)	.06		–0.21 (–0.46 to 0.07)	.05
11 AM	–0.22 (–0.47 to 0.07)	.13		–0.25 (–0.49 to 0.03)	.08
12 PM	–0.19 (–0.44 to 0.09)	.19		–0.20 (–0.45 to 0.08)	.16
1 PM	0.23 (–0.05 to 0.48)	.10		–0.10 (–0.36 to 0.48)	.51
2 PM	0.17 (–0.12 to 0.43)	.24		0.17 (–0.12 to 0.19)	.24
3 PM	0.24 (–0.04 to 0.49)	.09		–0.22 (–0.47 to 0.06)	.12
4 PM	0.18 (–0.11 to 0.43)	.23		0.16 (–0.12 to 0.42)	.26
5 PM	0.15 (–0.14 to 0.41)	.31		0.15 (–0.14 to 0.41)	.31
6 PM	–0.16 (–0.42 to 0.13)	.27		–0.15 (–0.41 to 0.13)	.30
7 PM	–0.12 (–0.39 to 0.16)	.39		–0.24 (–0.49 to 0.04)	.10
8 PM	–0.23 (–0.47 to 0.06)	.12		–0.23 (–0.47 to 0.06)	.11
9 PM	0.25 (–0.03 to 0.50)	.08		0.24 (–0.04 to 0.49)	.09
10 PM	0.32 (0.02 to 0.55)	.04		0.27 (–0.01 to 0.51)	.06
11 PM	0.41 (0.23 to 0.62)	.003		0.39 (0.13 to 0.61)	.005

^aPHQ-9: Patient Health Questionnaire-9.

^bGAD-7: General Anxiety Disorder-7.

^cItalics indicate significant results.