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Assurance de qualité pour le cancer rectal – phase 2 ...

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KCE Reports 81 PROCARE <strong>–</strong> <strong>phase</strong> 2 65Figure 19. Mean QI result per centre with at <strong>le</strong>ast 10 patients in the<strong>de</strong>nominator for at <strong>le</strong>ast 6 of the 10 measurab<strong>le</strong> QI (administrative cohort).10010909808707Mean QI result (%)605040654Number of measurab<strong>le</strong> QI30320210100The grey bars represent the mean QI results for non-PROCARE centres, whi<strong>le</strong> the blue barsrepresent the results of the PROCARE centres. The dots represent the number of measurab<strong>le</strong> QIper centre. A higher mean QI result is associated with better performance. These results arepreliminary, and cannot be used to judge the quality of care.3.2.3.3 Correlation analysisThe correlation analysis concerned 24 PROCARE centres. The results of theSpearman’s rank correlation test did not allow to reject the null hypothesis (rs=-0.45, p-value = 0.98). This indicates that there is no association between the mean correctedranks in the prospective and the administrative database for these 24 centres.Figure 20 shows the plots of the ranks based on the mean corrected ranks using thePROCARE and administrative database respectively. The points are scattered around,rather than lying on a line with a positive slope, ref<strong>le</strong>cting the absence of positivecorrelation between the two measures.Figure 20. Correlation between the ranks based on the mean correctedranks using the PROCARE and administrative database respectively.25ADMINISTRATIVE database201510500 5 10 15 20 25PROSPECTIVE database

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