Table 1

Baseline characteristics of the study population, by age group

Total population (N=562)Population aged ≥47 years old (n=261)Population aged <47 years old (n=301)
MeanSDn (%)MeanSDn (%)MeanSDn (%)
Age (years)45.210.053.64.237.97.5
Sex (female)236 (42)117 (45)119 (40)
Country of birth (non-Western)25 (4)9 (3)16 (5)
Current smoker165 (29)66 (25)99 (33)
Body mass index (kg/m2)27.34.827.54.327.15.1
 Overweight (body mass index ≥25 kg/m2)366 (65)186 (71)180 (60)
Cardiorespiratory fitness (mLO2/min/kg)31.98.929.87.533.39.5
Systolic blood pressure (mm Hg)134.014.4138.014.2130.513.7
Diastolic blood pressure (mm Hg)83.910.086.29.381.910.2
Pulse pressure (mm Hg)50.111.051.911.448.610.4
Hypertension (≥140/≥90 mm Hg and/or using antihypertensives)231 (41)129 (49)102 (34)
Using one or more of prescription medication (antihypertensive, antidepressive or heart medication)83 (15)61 (23)22 (7)
 Antihypertensive17 (3)11 (6)1 (1)
 Antidepressive16 (3)6 (3)6 (3)
 Heart medication67 (12)44 (24)10 (6)
Occupational group
 Cleaning91 (16)50 (19)41 (14)
 Manufacturing384 (68)169 (65)215 (71)
 Transport53 (9)25 (10)28 (9)
 Administration34 (6)17 (7)17 (6)
Educational level (skilled)183 (33)
Subjectively rated intensity of occupational physical activity (scale 1–4)76 (29)107 (36)
 1: mostly sedentary-no physical demands91 (16)32 (17)27 (15)
 2: mostly standing or walking-no physical demands103 (18)36 (19)34 (19)
 3: standing and walking with lifting or carrying257 (46)83 (45)85 (47)
 4: strenuous physical work79 (14)23 (12)25 (14)
Lifting and carrying at work (scale 1–6)3.71.43.71.43.61.5
 Lifting and carrying ≥50% of time224 (40)101 (39)123 (41)
Pushing and pulling at work (scale 1–6)3.81.43.91.33.71.4
 Pushing and pulling ≥50% of time198 (35)81 (31)117 (18)
Rate of perceived exertion at work (scale 1–10)5.82.25.82.25.72.2
Seniority in current or similar occupation (years)13.610.317.211.510.57.8
Work hours per week38.15.237.44.838.75.5
Shift work (night shift)78 (14)33 (13)45 (15)
Intensity of physical activity during leisure (%HRR)25.65.125.35.525.64.6
Total duration of included measurements of working hours (hours)18.77.719.37.718.37.5
Duration of included working hours per day (hours/day)7.61.37.61.37.61.3
Relative aerobic workload (%HRR) during working hours30.07.529.97.830.07.2
Mean %HRR ≥30 during working hours282 (50)126 (48)154 (51)
Working hours ≥30%HRR (hours/day)3.01.83.01.93.01.7
  • %HRR, per cent heart rate reserve.