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Table 1 Characteristics of the study population by tertiles of MET-hours* per week (MET- h/wk)

From: Prevalence and correlates of leisure-time physical activity among Nigerians

   Tertile 1 Tertile 2 Tertile 3
Characteristics Overall <2 2 - 8 >8
   n = 334 n = 355 n = 352
  Mean ± SD
Age (years) 41.6 ± 9.3 41.5 ± 8.3 42.9 ± 9.2 40.2 ± 10.3
Physical activity (METs/week) 6.8 ± 7.2 0.9 ± 0.7 5.2 ± 1.7 15.5 ± 6.7
Body-mass index (kg/m 2 ) 26.8 ± 7.2 27.4 ± 4.8 27.3 ± 5.0 26.7 ± 4.6
  Percentages
Age categories (years)     
 - <30 11 8 9 17
 - 30 – 39 28 31 27 26
 - 40 – 49 40 42 41 37
 - ≥ 50 21 19 23 20
Sex     
 - Male 60 63 52 66
 - Female 40 37 48 34
Body-mass index     
 - Normal weight 36 33 38 37
 - Overweight 38 40 36 39
 - Obese 26 27 26 24
Religion     
 - Christianity 80 71 85 84
 - Islam 20 29 15 16
Marital status     
 - Married 77 83 76 71
 - Not married 23 17 24 29
Education     
 - None 0.4 0 1 0
 - Primary (Elementary school) 0.6 2 0 0
 - Secondary (High school) 22 16 24 25
 - ≥ Tertiary (College) 77 82 75 75
Occupation     
 - Self-employed 3 3 2 2
 - Unskilled manual 7 9 6 6
 - Skilled manual 40 38 42 41
 - Professional/executive 50 50 50 51
Socio-economic status     
 - Low 40 37 41 41
 - Middle 40 39 41 41
 - High 20 24 18 18
Smoking     
 - Non-smoker 96 97 98 95
 - Current smoker 4 3 2 5
Alcohol     
 - None 65 71 67 57
 - 1 unit/day 12 9 13 15
 - 2–5 units/day 21 17 19 25
 - 5+ units/day 2 3 1 3
  1. *Metabolic equivalent (MET)-hours is sum of the average time per week spent in each leisure-time physical activity multiplied by the MET value for each activity.