Table 1.

Demographic and health characteristics (at baseline) by level of recreational physical activity (RPA), stratified for occupational physical activity (OPA)

Total (n = 8,221)
Low OPA (n = 4,423)High OPA (n = 3,798)
Non-RPA/low OPARPA/low OPANon-RPA/high OPARPA/high OPA
(n = 3,023)(n = 1,400)(n = 3,034)(n = 764)
Mean (SD)Mean (SD)P valueMean (SD)Mean (SD)P value
Age, years51.3 (8.0)51.6 (8.2)0.252352.0 (8.1)52.6 (8.0)0.0710
Height, cm177.0 (6.2)177.9 (6.4)<0.0001175.7 (6.2)176.3 (6.3)0.0445
Weight, kg81.3 (12.8)82.2 (11.4)0.019879.0 (11.8)79.6 (11.1)0.1738
Body mass index, kg/m225.9 (3.6)26.0 (3.2)0.643525.5 (3.4)25.6 (3.2)0.6633
Diastolic blood pressure, mm Hg89.0 (10.5)87.6 (10.4)<0.000187.9 (10.1)86.6 (9.9)0.0015
Systolic blood pressure, mm Hg140.7 (18.9)138.1 (18.5)<0.0001139.9 (18.6)138.0 (18.1)0.0134
Serum cholesterol, mmol/L6.40 (1.1)6.37 (1.0)0.35236.40 (1.1)6.33 (1.0)0.1079
Serum glucose, mg/dl83.4 (15.5)81.7 (11.3)<0.000182.6 (13.5)82.8 (17.6)0.7718
n (%)n (%)P valuen (%)n (%)P value
Diabetes, type 2139 (4.6)51 (3.6)0.145114 (3.8)28 (3.7)0.9029
Smoking status<0.0001<0.0001
 Never smoker552 (18.3)342 (24.4)625 (20.6)216 (28.3)
 Former smoker710 (23.5)358 (25.6)625 (20.6)169 (22.1)
 Current smoker1,761 (58.2)700 (50.0)1,783 (58.8)379 (49.6)
Regular health check-up643 (21.3)412 (29.4)<0.0001496 (16.3)166 (21.7)0.0005
Prostate disease in the family299 (9.9)169 (12.1)0.0283203 (6.7)51 (6.7)0.9878
Education<0.0001<0.0001
 Primary and secondary2,173 (71.9)683 (48.8)2,863 (94.4)652 (85.4)
 College467 (15.4)356 (25.4)136 (4.5)85 (11.1)
 University383 (12.7)361 (25.8)35 (1.1)27 (3.5)
Location of first residencea<0.0001<0.0001
 Reykjavik1,106 (36.9)645 (46.1)955 (31.5)342 (44.8)
 Seaside village1,008 (33.3)395 (28.2)1,115 (36.8)238 (31.2)
 Rural area750 (24.8)294 (21.0)794 (26.2)160 (20.9)
 Combination of rural area and seaside village105 (3.5)38 (2.7)116 (3.8)20 (2.6)
  • aNumbers do not add up to 100% due to missing values.