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Table 1 Lifestyle variables for the year preceding academy entrance

From: Determinants of bone mass and bone size in a large cohort of physically active young adult men

Variable Mean ± SD (Caucasians) Mean ± SD (African Americans) Mean ± SD (Asians)
Age (years) 18.7 (± 1.05) 18.5 (± 0.94) 18.5 (± 0.73)
Variable Percentage (n) Percentage (n) Percentage (n)
Exercise (hrs/week)    
   1–3 5.5 (36) 6.3 (4) 10.5 (4)
   4–6 19.5 (127) 23.3 (15) 19.5 (6)
   7–10 30.9 (201) 28.1 (18) 30.9 (13)
   11+ 44.1 (287) 42.2 (27) 44.1(15)
Milk (glass/day)    
   0 4.4 (29) 4.7 (3) 7.9 (3)
   < 1 17.0 (111) 28.1 (18) 13.2 (5)
   1–2 47.4 (309) 43.8 (28) 50.0 (19)
   3+ 31.1 (203) 23.4 (15) 28.9 (11)
Caffeinated (Drinks/day)    
   None 17.1 (111) 14.3 (9) 36.8 (14)
   1–3 70.3 (457) 76.2 (48) 57.8 (22)
   3+ 12.6 (82) 9.5 (6) 5.3 (2)
Alcohol Consumption    
   Less than once a month 57.8 (375) 78.1 (50) 66.7 (22)
   1–3 times a month 22.7 (147) 15.6 (10) 30.3 (10)
   1–2 times a week 14.6 (95) 4.7 (3) 9.1 (3)
   3–5 times a week 4.0(26) 1.6(1) 0.0 (0)
   daily 0.9 (6) 0.0 (0) 0.0 (0)
Smokers 5.1 (41) 4.7 (3) 13.1 (5)