Table 4 Pre‐ and post‐test means and gain of sum scores on knowledge and attitude on whole‐body vibration (WBV) issues among OHS professionals for whom pre‐ and post‐test data were available.
| Experimental group (n = 13) | Control group (n = 8) | |
|---|---|---|
| Mean sum score (SD) | Mean sum score (SD) | |
| Knowledge | ||
| Pretest mean M1 | 12.3 (3.2) | 12.5 (2.1) |
| Post‐test mean M2 | 15.3 (2.2) | 13.3 (2.5) |
| Gain score M2‐M1 | 3.0 (2.9) | 0.8 (3.0)* |
| Attitude | ||
| Pretest mean M1 | 13.5 (5.7) | 6.4 (8.9) |
| Post‐test mean M2 | 13.0 (8.5) | 8.5 (7.7) |
| Gain score M2‐M1 | −0.7† (7.6) | 2.7† (7.3) |
†Due to missing values, a gain score from one case could not be calculated.
*Difference in gain score: Mann Whitney U test, p = 0.08, one‐tailed.