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. Author manuscript; available in PMC: 2010 Aug 30.
Published in final edited form as: J Bone Miner Res. 2008 Dec;23(12):1915–1922. doi: 10.1359/jbmr.080712

Table 1.

Characteristics of the study population

No fractures (n= 33809) Fractures (n= 2408) p value*
Mean (sd)
Age (years) 56.1(5.5) 57.1 (5.6) <.0001
BMI (kg/m2) 23.2 (3.3) 23.3 (3.4) 0.01
Physical activity (METs/day) 52.7 (36.6) 53.7 (36.1) 0.18
Number of children 2.1 (1.2) 2.0 (1.3) 0.03
Alcohol intake (g/day) 11.0 (14.0) 11.5 (14.4) 0.12
Energy (alcohol excluded) (Kcal/day) 1988.1 (532.2) 1973.3 (526.5) 0.19
Total proteins (g/1000Kcal/day) 45.7 (7.3) 46.0 (7.6) 0.09
Animal proteins (g/1000Kcal/day) 28.4 (8.7) 28.8 (8.9) 0.04
Vegetal proteins (g/1000Kcal/day) 12.2 (3.1) 12.1 (3.2) 0.39
Proteins by kg of weight (g/kg/day) 1.45 (0.43) 1.44 (0.43) 0.16
Dietary calcium (mg/1000Kcal/day) 526.4 (161.3) 520.7 (155.2) 0.08
Dietary potassium (mg/1000Kcal/day) 1916.4 (451.6) 1922.6 (441.1) 0.51
RNAE (mEq/day) 45.46 (16.57) 45.76 (19.03) 0.07

N (%)
Maternal history of hip fracture 2928 (8.7) 240 (10.0) 0.03
HT use (% ever) 24072 (71.2) 1516 (63.0) <.0001
Current smokers 4082 (12.0) 297 (12.3) 0.71
Calcium supplement users 7019 (20.8) 291 (12.1) <.0001
*

Student’s t test for quantitative variables, Chi2 for qualitative variables

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