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Table 2 Descriptives of quality indicators

From: Data quality indicators for daily life chart methodology: prospective self-ratings of bipolar disorder and alcohol use

Indicator Compliance Consistency Reactivity
Operationalisation Average observation length (SD) Average % missings (SD) Average Spearman’s rank order correlation LC depression-CGI expert (SD) Average Spearman’s rank order correlation LC mania-CGI expert (SD) Average Spearman’s rank order correlation LC mood-LC severity (SD) Average alcohol consumption week 1 minus week 4 (SD)
Raw average 347 days (90) range: 60–529 1.6 (4.2)* rho = 0.61 (0.35) N = 122*** rho = 0.63 (0.45) N = 105*** rho = 0.70 (0.28) N = 134 Mean difference no. of drinks 0.15 (1.59)** range: −3.71 to 11.29
Quality indicator average (between 0 and 1) 0.61 (0.19) 0.98 (0.04) 0.80 (0.17) 0.82 (0.22) 0.85 (0.14) 0.74 (0.11)
  1. Number of cases is 137, unless stated otherwise
  2. * N = 48 (35 %) had missing data points
  3. ** 51 patients had more drinks in week 4 than in week 1, with a maximum of 3.71 more (sum: 44.29). Also, 51 patients drank less in week 4, but with a maximum of 11.29 less (sum: 64.98). Thus, the difference in a reactive direction—drinking less as a result of reporting alcohol consumption—is higher
  4. *** No correlations could be established in cases where one of the two series of values was constant; this was often the case