How do common conditions impact health-related quality of life for children? Providing guidance for validating pediatric preference-based measures

Table 1 Patient characteristics of the study sample

Sample characteristics	Baseline sample		All the observations used (N = 9774, observations = 52,993)
Sample characteristics	B cohort wave 2 (N = 4606)	K cohort wave 1 (N = 4983)	All the observations used (N = 9774, observations = 52,993)
Male, yes, %	51.0	51.0	51.1
Indigenous, yes, %	3.9	3.8	3.1
Special health care needs, yes, %	11.3	13.2	15.8
Primary carer's education with bachelor, yes, %	33.9	28.1	34.4
SEIFA, mean (SD)	1008.5 (74.1)	1005.7 (78.3)	1009.8 (75.5)

Descriptive information is given as arithmetic means and standard deviations (SD) or frequencies and percentages (%). The baseline sample of B Cohort for this study is wave 2 since B cohort has no HRQoL data in wave 1 (0–1 year). The sample sizes of B cohorts from Wave 2 to 7 are 4606, 4386, 4242, 4085, 3764, 3381 respectively, totaling 24,464. The sample sizes of K cohorts from Wave 1 to 7 are 4983, 4464, 4331, 4169, 3956, 3537, 3089 respectively, totaling 28,529
SEIFA socio-economic index for areas, SD standard deviation

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