Table 3Number of different quality improvement strategies included in articles

Number of QI types in interventionNumber of comparisons
RCTs Non-RCTs* Total
Single QI type 145, 3134, 39, 47, 53, 56, 57, 74, 8082 34, 36, 64 17
Multiple (total) 501565
2 QI strategies211, 11, 16, 18, 19, 27, 37, 42, 44, 4851, 56, 59, 60, 70, 71, 75, 7779 68, 20, 43, 58, 63, 66 27
3 QI strategies157, 10, 12, 15, 22, 26, 40, 41, 45, 46, 52, 68, 69, 72, 76 63, 14, 21, 29, 54, 65 21
4 QI strategies106, 13, 23, 24, 28, 30, 55, 61, 62, 73 32, 9, 17 13
5 QI strategies335, 38, 67 03
6 QI strategies125 01
*

Includes 6 publications (with 7 comparisons) that are quasi-RCTs3, 8, 9, 17, 43, 58, 64 and 9 publications (with 11comparisons that are controlled before-after studies2, 4, 14, 20, 21, 29, 36, 54, 63, 65, 66

From: 3, Results

Cover of Closing the Quality Gap: A Critical Analysis of Quality Improvement Strategies (Vol. 3: Hypertension Care)
Closing the Quality Gap: A Critical Analysis of Quality Improvement Strategies (Vol. 3: Hypertension Care).
Technical Reviews, No. 9.3.
Walsh J, McDonald KM, Shojania KG, et al.

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