Table 3 Descriptive statistics of studies reviewed
From: Effects of organisational-level interventions at work on employees’ health: a systematic review
Variable | Number of studies/median and range |
|---|---|
EGP occupational class | |
I-III | 18 |
I-III, VI-VII | 6 |
VI-VII | 15 |
Study design | |
Quasi-experimental, cross-sectional | 1 |
Quasi-experimental one-group prospective | 9 |
Quasi-experimental prospective with control group | 21 |
Quasi-experimental prospective and retrospective | 2 |
Randomized controlled | 6 |
Evidence grade | |
High | 4 |
Medium | 25 |
Low | 10 |
Significant intervention effects | |
No | 21 |
Yes | 18 |
Intervention type | |
Organisational intervention (OI) | 9 |
Participatory (including Participatory Ergonomics PE and Participatory Research Action PAR) | 7 |
Shift schedules | 18 |
Other | 5 |
Year of publication | 2005 [1993, 2012] |
Sample size at baseline | 300 [41, 3506] |
Sample size at follow-up | 187 [36, 2617] |
Sample size of control group | 122 [31, 347] |
Follow-up time (years) | 1 [0.25, 13] |
Study quality | 7 [1,11] |
Number of working conditions changed | 2 [1,4] |