Table 1

Baseline characteristics for men and women by treatment group
MEN WOMEN
Caffeinated Decaffeinated No Coffee Caffeinated Decaffeinated No Coffee
(N = 4) (N = 4) (N = 6 ) (N = 10) (N = 9) (N = 9 )
Age (years) 37.2 (3.5) 35.0 (6.4) 47.3 (18.4) 40.0 (8.8) 43.2 (16.6) 38.4 (18.0)
Body mass index (kg/m2) 30.8 (1.9) 29.5 (2.7) 30.4 (1.3) 28.4 (1.9) 29.5 (2.2) 29.2 (2.5)
Waist circumference (cm) 97.7 (7.3) 102.9 (8.3) 102.0 (6.8) 85.9 (10.6) 90.9 (7.8) 88.3 (7.4)
Postmenopausal (n (%)) n/a n/a n/a 2 (20) 5 (56) 3 (33)
SHBG (nmol/L) 21.4 (13.7, 33.5) 19.5 (11.7, 32.5) 29.3 (18.2, 47.3) 52.6 (35.2, 78.6) 42.9 (28.6, 64.2) 38.1 (25.4, 57.0)
Testosterone (ng/dL) 387.9 (303.6, 495.7) 342.3 (259.0, 452.2) 475.5 (356.2, 634.6) 28.2 (19.2, 41.5) 27.3 (18.1, 41.1) 34.9 (23.2, 52.4)
Free testosterone (ng/dL) 8.0 (6.2, 10.3) 7.1 (5.3, 9.5) 8.0 (5.9, 10.7) 0.3 (0.2, 0.5) 0.3 (0.2, 0.5) 0.4 (0.2, 0.8)
Estradiol (pg/mL) 24.0 (17.0, 33.8) 21.7 (14.7, 32.1) 26.2 (17.5, 39.3) 47.4 (26.2, 85.8) 34.8 (18.6, 65.2) 47.7 (25.5, 89.4)
Free estradiol (pg/mL) 0.5 (0.3, 0.7) 0.4 (0.3, 0.7) 0.5 (0.3, 0.7) 0.8 (0.4, 1.4) 0.5 (0.3, 1.0) 0.8 (0.4, 1.5)
Testosterone : Estradiol 16.2 (11.4, 23.0) 15.8 (10.6, 23.5) 18.1 (12.0, 27.4) 0.6 (0.3, 1.2) 0.8 (0.4, 1.6) 0.7 (0.4, 1.5)
DHEAs (ng/mL) 184.1 (113.7, 298.1) 160.0 (92.4, 277.2) 161.7 (96.8, 270.1) 115.2 (82.7, 160.5) 98.1 (69.0, 139.3) 117.4 (82.7, 166.7)

n/a, not applicable; SHBG, sex hormone-binding globulin; DHEAs, dehydroepiandrosterone sulfate.

Data are arithmetic means (standard deviation) for continuous variables and percentages for categorical variables. Age-adjusted geometric means (95% confidence in intervals) are presented for hormone concentrations which did not follow a normal distribution.

Wedick et al.

Wedick et al. Nutrition Journal 2012 11:86   doi:10.1186/1475-2891-11-86

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