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Table 3 Comparison of prospective cost diary and retrospective questionnaire for overlapping time (n = 90)*

From: Development and first assessment of a questionnaire for health care utilization and costs for cardiac patients

  Retrospective cost questionnaire Cost diary ICC p**
  Mean (SD) Mean (SD)   
Number of physician visits 1.9 (1.9) 2.2 (2.2) 0.64 0.13
Inpatient days 0.54 (2.1) 0.54 (2.0) 0.90 0.99
Days off work 13.8 (14.9) 15.7 (14.0) 0.77 0.06
Number of drugs 4.1 (1.5) 3.9 (1.4) 0.72 0.09
Cost of medical intake (€) 2.9 (1.5) 2.6 (1.3) 0.57 0.04
Cost of medical aids (€) 162.3 (258.6) 175.5 (264.6) 0.72 0.52
  1. *For three participants, comparison was not feasible as they did not return their cost diaries.
  2. **Wilcoxon sign rank test.