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Table 1 Distribution of evaluation designs (n = 105)

From: Which design to evaluate complex interventions? Toward a methodological framework through a systematic review

 

Total

N (%)

Process and mechanism evaluations

N (%)

 

Individual randomized trials

23 (21.9)

14 (13.3)

Randomized trial adaptations

47 (44.8)

43 (40.9)

Cluster randomized trials

25 (23.8)

23 (21.9)

Pragmatic trials

9 (8.6)

8 (7.6)

Cluster and pragmatic

13 (12.4)

12 (11.4)

Alternative methods to RCT

36 (34.3)

27 (25.7)

Quasi-experimental

14 (13.3)

12 (11.4)

Cohort study

6 (5.7)

1 (0.1)

Realist evaluation

7 (6.7)

7 (6.7)

Case studies and other approachesa

9 (8.6)

7 (6.7)

  1. a(Triangulated approach, goal-based evaluation, constructivist evaluation illuminative evaluation)