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. 2021 Aug 5;8(8):e28360. doi: 10.2196/28360

Table 4.

User burden and system usability stratified by workers and psychological distress.

Variable		Unemployed (n=137)	Essential worker (n=140)	P value	Nondistressed (n=41)	Distressed (n=236)	P value	Total (N=277)
Overall burden				<.001^b,c			.30^a
	Count, n	134	140		41	233		274
	Mean (SD)	7.2 (8.2)	13.7 (17.8)		8.4 (13.8)	10.9 (14.4)		10.5 (14.3)
Difficulty of use				.002^b,c			.42^a
	Count, n	134	140		41	233		274
	Mean (SD)	1.5 (2.2)	2.8 (4.0)		1.8 (3.8)	2.2 (3.2)		2.2 (3.3)
Physical burden				<.001^b,c			.52^a
	Count, n	134	139		40	233		273
	Mean (SD)	0.4 (1.4)	1.5 (2.9)		0.8 (2.0)	1.0 (2.4)		1.0 (2.3)
Social and time burden				<.001^b,c			.99^a
	Count, n	134	140		41	233		274
	Mean (SD)	1.1 (2.2)	2.6 (4.0)		1.9 (3.3)	1.9 (3.3)		1.9 (3.3)
Mental and emotional burden				<.001^b,c			.80^a
	Count, n	134	140		41	233		274
	Mean (SD)	1.1 (2.1)	2.5 (3.9)		1.7 (3.3)	1.8 (3.2)		1.8 (3.2)
Privacy burden				.001^b,c			.22^a
	Count, n	134	140		41	233		274
	Mean (SD)	1.2 (2.1)	2.3 (3.2)		1.3 (2.6)	1.9 (2.8)		1.8 (2.8)
Financial burden				.59^a			.002^b,c
	Count, n	134	140		41	233		274
	Mean (SD)	1.9 (2.5)	2.0 (2.3)		1.1 (1.8)	2.1 (2.5)		2.0 (2.4)
System Usability Score				.19^a			.96^a
	Count, n	134	139		40	233		273
	Mean (SD)	77.0 (16.2)	74.3 (17.0)		75.5 (17.6)	75.6 (16.5)		75.6 (16.6)

^aEqual variance two-sample t test.

^bUnequal variance two-sample t test.

^cP values <.05 and less than the Benjamini-Hochberg critical value were considered to be statistically significant.