Table 4.

Descriptive indicators related to the preliminary phase of the INAIL's methodology to assess and manage the risks related to work-related stress (number of companies interviewed = 124).

Preliminary phase
Implemented
Yes	97.4%
No	2.6%
	100.0%
Perceived usefulness
Mean (ranking 1–5)	3.57
Standard deviation	0.785
Involvement
Workers' involvement
Yes	85.7%
No	14.3%
	100.0%
Target of the strategy
Workers' representatives for safety	27.4%
Trade union representatives	1.0%
All workers	39.3%
A sample of workers	32.3%
	100.0%
Way of involvement
Meetings	65.3%
E-mail	7.8%
Intranet alerts	5.4%
Posts on the bulletin board	5.8%
Brochure	15.7%
	100.0%
Training
Specific training
Yes	73.8%
No	26.2%
	100%
Type of training
Traditional course	85.9%
E-learning	14.1%
	100.0%
Perceived usefulness of training
Mean (ranking 1–5)	3.50
Standard deviation	0.741
Identification of homogeneous
groups of workers
Use of ad hoc tools
Yes	74.4%
No	25.6%
	100.0%
Perceived usefulness of ad hoc tools
Mean (ranking 1–5)	3.18
Standard deviation	0.724