Is assessment of oral health-related quality of life burdensome? An item nonresponse analysis of the oral health impact profile

Table 3 Four random-intercept logistic regression models relating order of 46 OHIP items as a linear variable or an indicator variable to missing OHIP item responses

		Data collection without supervision	Data collection with supervision
		General population participants in Sweden	Patients and general population participants in Germany, Hungary, Japan, Slovenia, Sweden
	Odds ratio (95% confidence interval)
Random effects model with item order as linear variable	Rank order	1.05 (0.99–1.10)	1.04 (0.97–1.11)
	Intercept	0.01 (0.00–0.00)	0.00 (0.00–0.01)
Random effects model with item order as indicator variable	Rank order summary^‡
	Median	0.89	1.61
	IQR^*	0.69–1.001	1.15–2.08
	Range	0.37–1.92	0.70–3.06
	Intercept	0.00 (0.00–0.00)	0.00 (0.00–0.00)

^*Interquartile range, ^‡Summary of 45 estimated ORs of indicator variables (confidence intervals not shown)

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