Table. 1 Age-standardised characteristics of the study population at baseline by quartiles of physical activity (self-reported).

From: Association between physical activity, grip strength and sedentary behaviour with incidence of malignant melanoma: results from the UK Biobank

  Gender-specific quartile of subjective physical activity (MET-minutes/week of MVPA); n = 350,512
1st Quartile lowest PA 2nd Quartile 3rd Quartile 4th Quartile highest PA Missing values
Number of participants 87,705 87,680 87,632 87,495  
Gender      0
 Women (%) 50.6 50.9 50.8 51.0  
Age (years) 55.9 56.0 56.0 56.0 0
MET-minutes per week of MVPA 419.0 1286.2 2571.8 6362.2 0
Grip strength (kg) 30.9 31.6 32.0 32.2 0
Sedentary behaviour (h/d) 5.2 4.8 4.6 4.6 0
Region      0
 England 88.3 88.3 88.6 89.5  
 Wales 4.6 4.0 3.9 3.9  
 Scotland 7.1 7.6 7.5 6.6  
Education      1999
 University/College 37.3 41.3 39.0 28.1  
 A-/AS-levels, NVQ, HND, HNC, equivalent, other professional qualification 23.4 23.2 23.2 24.6  
 O-levels, CSEs, equivalent 26.0 24.4 25.6 30.0  
 None of the above 13.3 11.1 12.2 17.3  
Smoking (pack years) 7.7 6.1 6.0 6.9 6452
Alcohol (g/d) 17.5 17.5 17.9 18.7 49,841
Coffee (cups/d) 2.1 2.0 2.0 2.0 153
Standing height (cm) 169.3 169.5 169.4 168.9 309
Overall health rating      812
 Excellent 12.1 17.5 22.0 22.7  
 Good 55.1 60.8 60.3 59.3  
 Fair 25.5 18.9 15.5 16.0  
 Poor 7.3 2.8 2.2 2.0  
UV sensitivity score category      9757
 Low UV sensitivity 42.3 43.0 44.0 46.0  
 High UV sensitivity 57.7 57.1 56.0 54.0  
Time spent outdoors summer (h/d) 3.0 3.4 3.8 4.7 7497
Sunburn occasions in childhood 1.7 1.8 1.8 1.7 75,150
Solarium/Sunlamp use (%) 9.0 9.2 9.6 10.2 1675
Season during baseline assessment      0
 Spring 28.7 28.6 28.3 28.7  
 Summer 24.8 25.6 26.7 28.1  
 Autumn 23.7 24.1 24.4 24.1  
 Winter 22.8 21.7 20.7 19.1  
Job with UV exposure (%)a 4.7 4.9 6.8 16.5 5
  1. Age standardisation was done by direct standardisation to the age distribution of the cohort at baseline.
  2. PA physical activity, MET metabolic equivalent of task, UV ultraviolet radiation.
  3. aIn a subset of 212,700 participants who are currently in paid employment or self-employed.