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Table 4 Comparison of self-report and administrative data on number of physician visits by levels of disease activity

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

Disease Activity

Self-report Mean (standard error)

Admin Data Mean (standard error)

p-value§

Concordance Correlation Coefficient Pearson Correlation Coefficient (Bias Correction Factor Cb)

Consistently inactive (n = 77)

4.42a (0.45)

7.75b (0.83)

<0.0001

0.455† 0.629 (0.724)

Fluctuating (n = 71)

6.83 (0.78)

10.41 (0.91)

<0.0001

0.543† 0.619 (0.877)

Consistently active (n = 186)

8.24 (0.58)

12.88 (0.78)

<0.0001

0.592† 0.692 (0.855)

  1. §Correlated t-test
  2. a,bConsistently inactive and consistently active are statistically significantly different (p < 0.0001) by one-way ANOVA and Bonferroni multiple comparisons.