Table 1.
ROI result by study design, level of prevention and type of intervention
| Positive ROI | Negative ROI | Neutral ROI | Undetermined ROI | Total | |
|---|---|---|---|---|---|
| Study design | |||||
| Experimental N (%) | 24 (39%) | 9 (15%) | 8 (13%) | 21 (34%) | 62 (100%) |
| Quasi-experimental N (%) | 22 (76%) | 1 (3%) | 3 (10%) | 3 (10%) | 29 (100%) |
| Observational N (%) | 25 (68%) | 1 (3%) | 1 (3%) | 10 (27%) | 37 (100%) |
| Modelling N (%) | 7 (70%) | 1 (10%) | 1 (10%) | 1 (10%) | 10 (100%) |
| Level of prevention | |||||
| Primary prevention N (%) | 48 (58%) | 7 (8%) | 11 (13%) | 17 (20%) | 83 (100%) |
| Secondary prevention N (%) | 14 (58%) | 1 (4%) | 1 (4%) | 8 (33%) | 24 (100%) |
| Tertiary prevention N (%) | 32 (55%) | 5 (9%) | 2 (3%) | 19 (33%) | 58 (100%) |
| Type of intervention | |||||
| Organizational N (%) | 11 (50%) | 1 (5%) | 1 (5%) | 9 (41%) | 22 |
| Technical N (%) | 27 (55%) | 6 (12%) | 4 (8%) | 12 (24%) | 49 |
| Human N (%) | 68 (54.4%) | 12 (9.6%) | 12 (9.6%) | 33 (26.4%) | 125 |