. 2018 Mar 5;20(3):e64. doi: 10.2196/jmir.7802

Table 4.

Health-related quality of life of adolescents aged 11-17 years by survey design and data collection mode (mean values).

Health related quality of life		Survey design^a								Data collection mode^a
		Single-mode design	Sequential MM^bdesign		Concurrent MM^bdesign		Preselect MM^bdesign		SAQ-Web^c (crude)		SAQ-paper^d (crude)			SAQ-Web^c (adjusted^e)		SAQ-paper^d (adjusted^e)
		n (%)	n (%)	P^h	n (%)	P^h	n (%)	P^h	n (%)		n (%)	P	n (%)		n (%)		P
Dimensions
	Physical well-being (mean)^f	337 (49.9)	263 (49.9)	.98	282 (49.2)	.38	290 (49.0)	.21	297 (49.5)		874 (49.5)	.95	297 (49.0)		874 (49.7)		.26
	Psychological well-being (mean)^f	336 (51.2)	265 (50.0)	.14	283 (49.6)	.05^g	291 (49.8)	.07	297 (49.6)		877 (50.4)	.20	297 (49.3)		877 (50.5)		.07
	Relations with parents (mean)^f	331 (53.5)	263 (53.0)	.52	283 (53.3)	.74	290 (52.0)	.04^g	296 (52.5)		871 (53.1)	.31	296 (52.3)		871 (53.2)		.18
	Relations with peers (mean)^f	340 (51.2)	266 (50.1)	.14	288 (50.5)	.37	292 (50.1)	.13	297 (49.8)		888 (50.8)	.12	297 (49.9)		888 (50.7)		.18
	Well-being in school (mean)^f	335 (51.9)	265 (51.6)	.66	283 (50.8)	.08	285 (51.4)	.43	294 (51.1)		873 (51.60)	.31	294 (50.9)		873 (51.70)		.17

^aSample sizes are shown in Table 1.

^bMM: mixed-mode.

^cSAQ-paper: self-administered paper-based questionnaire.

^dSAQ-Web: self-administered Web-based questionnaire.

^eAdjusted for age of the child (adolescent, parent); sex of the child (adolescent); relationship to the child (parent); household income (adolescent, parent); parental education (adolescent, parent); adolescent education (adolescent); region (adolescent, parent); municipality size (adolescent, parent); and parental marital status (parent).

^fSelf-reported by adolescents aged 11-17 years.

^gNot significant, P value adjusted with Bonferroni correction.

^hTested against single-mode control group.