Health service utilization in IBD: comparison of self-report and administrative data

Table 3 Comparison of Self-Report and Administrative Data On Number of Physician Visits and Hospital Nights in the Last 12 Months

Variable	Self-report Mean (standard error)	Admin Data Mean (standard error)	p-value^§	Concordance Correlation Coefficient Pearson Correlation Coefficient (Bias Correction Factor C_b)
All respondents (n = 352)
Physician Visits	6.92 (0.37)	11.09 (0.50)	<0.0001*	0.58^† 0.68 (0.85)
Hospital Nights	2.20 (0.62)	1.75 (0.42)	0.09	0.86^† 0.93 (0.93)
Hospital Nights IBD	1.96 (0.61)	1.46 (0.40)	0.13	0.80^† 0.88 (0.91)
Respondents with at least one hospital admission by either self-report or administrative data
Hospital Nights n = 63	12.29 (3.16)	9.76 (2.07)	0.09	0.84^† 0.92 (0.91)
Hospital Nights IBD n = 44	15.70 (4.44)	11.68 (2.76)	0.13	0.75^† 0.84 (0.89)

^§Correlated t-test, *statistically significant (p < 0.0001), ^†statistically different from 0 at 0.05 level of significance.
Note: Maximum number of physician visits for the self-report data was 57 and for administrative data it was 67. Maximum hospital nights for self-report data was 170 and for administrative data it was 91.

ISSN: 1472-6963