Table 1. The criteria for classifying the employees into “high risk” and “intermediate risk” groups.

Topic	Criteria
“High risk” for work disability	At least one of the criteria fulfilled
Impairment due to musculoskeletal problems at work19	⩾5 (scale 0–10)
Potential depression20	DEPS score ⩾11 (scale 0–30)
Distress21	“Very much” feeling tense, strained, nervous and/or anxious because things are on one’s mind all the time
Fatigue19	“Very much” feeling of being squeezed empty because of work
Sleep disturbances22	Problems in falling asleep or night awakenings AND daytime tiredness daily or almost daily
Future working ability23	Uncertain of own ability or quite sure of not being able to continue in the present job due to health problems
“Intermediate risk” for work disability	At least one of the criteria fulfilled, but none of the criteria for “high risk” fulfilled
Impairment due to musculoskeletal problems at work19	4 (scale 0–10)
Impairment due to musculoskeletal problems at leisure time activities19	⩾5 (scale 0–10)
Pain (frequency and intensity)	At least “moderate” pain that “affects working ability” at minimum three times a week
Weight problems	BMI (body mass index) ⩾30 or BMI ⩽18.5
Excess alcohol consumption24	Males ⩾350 ml/week; Females ⩾240 ml/week*
Mood disturbances20	DEPS score ⩾8, (scale 0–30)
Sleep disturbances22	Problems in falling asleep or night awakenings AND daytime tiredness three times a week or more
Daytime sleepiness25	Epworth sleepiness scale (ESS) score ⩾8 (scale 0–24)
Suspicion of sleep apnoea22	Snoring and shortness of breath while asleep daily or almost daily
Insufficient sleep	Difference between reported need and the realisation of sleep ⩾2 h

*Expressed as absolute alcohol.