Work ability assessment in a worker population: comparison and determinants of Work Ability Index and Work Ability score

Table 1 Distribution of individual and professional variables in the sample (n= 12,839) (Figures rounded to one decimal)

Variable	Categories	N	%
WAI score	Excellent	5365	41.8
	Good	5027	39.2
	Moderate	1897	14.8
	Poor	550	4.3
Gender	Male	9412	73.3
Age	[40–45]	5471	42.6
	[45–50]	3856	30.0
	[50–55]	2308	18.0
	[55–60]	1008	7.9
	[60–65]	196	1.5
BMI	Underweight (< 18.5)	119	0.9
	Normal [18.5-25]	4425	34.5
	Overweight [25-30]	5214	40.6
	Obesity (≥ 30)	3076	24.0
	Missing values	5
Smoking habits	Non-smoker	9222	71.8
	Former smoker	538	4.2
	from 1 to 10 cigarettes	753	5.9
	from 11 to 20 cigarettes	1053	8.2
	from 21 to 30 cigarettes	836	6.5
	Over 30 cigarettes	437	3.4
Type of position	Physical	4208	32.8
	Mental	2809	21.9
	Mixed	5822	45.3
FICD	Presence	445	3.5
MSD	Presence	4915	38.3
Mental diseases	Presence	1317	10.3
Size of firm staff	1-9	1972	17.1
	10-49	3871	33.6
	50-249	3887	33.7
	Over 250	1798	15.6
	Missing values	1311

BMI in kg/m², FICD: Functional and ischemic cardiac diseases, MSD: Musculoskeletal disorders.