Table 3 Pre‐ and post‐test means and gain scores of the whole‐body vibration (WBV) exposure levels of work situations for whom pre‐ and post‐test data were available.

	Experimental group (n = 73)	Control group (n = 39)	90% CI for difference
	Mean asit (m/s2) (SD)	Mean asit (m/s2) (SD)
Pretest mean M1	0.92 (0.33)	0.86 (0.25)	(−0.05 to 0.17)
Post‐test mean M2	0.84 (0.29)	0.89 (0.49)	(−0.21 to 0.11)
Gain score M2‐M1	−0.08 (0.35)	0.03 (0.33)	(−0.22 to 0.00)*

*Difference in gain score: p = 0.06, t test, one tailed.

(a_sit, vectorsum of the frequency weighted accelerations; M1, measurement at pretest; M2, measurement at post‐test).