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Table 2 Tangible achievements of QCC theme activities (%, x ¯ ± SD)

From: The role of quality control circles in sustained improvement of medical quality

Theme activity Reductions in internal errors Reductions in costs Increases in degree of patient satisfaction Increases in work quality Improvements in economic performance
Index      
Achievement index 109.8 ± 16.5 135.0 ± 50.3 126.3 ± 53.7 100.6 ± 22.8 104.1 ± 5.5
Improvement index 61.1 ± 13.2 60.5 ± 28.9 34.4 ± 23.0 49.2 ± 25.4 73.7 ± 5.2