The Use of Parsimonious Questionnaires in Occupational Health Surveillance: Psychometric Properties of the Short Italian Version of the Effort/Reward Imbalance Questionnaire

Table 1

Companies participating in the study and participation rates.

Name	Sector	N cases	% of sample	Eligible workers, N	Participation rate, %
A	Financial	34	1.9	35	97.1
B	Social services	42	2.3	44	95.5
C	Health care	158	8.8	163	96.9
D	Retail	24	1.3	26	92.3
E	Retail	53	2.9	55	96.4
F	Social services	206	11.4	208	99.0
G	Social services	39	2.2	43	90.7
H	Health care	193	10.7	202	95.5
I	Retail	38	2.1	40	95.0
L	Financial	28	1.6	29	96.6
M	Social services	88	4.9	91	96.7
N	Social services	20	1.1	22	90.9
O	Health care	79	4.4	82	96.3
P	Health care	268	14.9	285	94.0
Q	Health care	16	.9	18	88.9
R	Health care	284	15.8	312	91.0
S	Retail	142	7.9	144	98.6
T	Financial	67	3.7	68	98.5
U	Retail	24	1.3	24	100.0
V	Total	1803	100.0	1891	95.3