Table 1

Descriptive variables for Caucasian women (values are mean (standard deviation) unless otherwise stated)

Variable
All Women (n = 107)
Women with Normal Cycles (n = 81)
Women with Amenorrhea/Oligomenorrhea (n = 25)
Women on Oral Contraceptives (n = 12)
Women never on Oral Contraceptive (n = 95)


Mean (SD)
Mean (SD)
Mean (SD)
Mean (SD)
Mean (SD)

Age
18.4 (± 0.8)
18.4 (± 0.8)
18.6 (± 0.9)
18.6 (± 1.0)
18.4 (± 0.7)
Age of Menarche (years)
12.8 (± 1.2)
12.6 (± 1.1)
13.6 (± 0.9) *
12.5 (± 1.2)
12.9 (± 1.1)
BMI (kg/mg2)
23.0 (± 2.3)
23.3 (± 2.4)
22.6 (± 2.0)
22.8 (± 1.8)
23.2 (± 2.4)
Height (inches)
65.7 (± 2.4)
65.6 (± 2.5)
66.1 (± 1.8)
64.6 (± 3.0)
65.8 (± 2.3)
Weight (pounds)
142 (± 17)
142.4 (± 17.8)
140.6 (± 15.3)
135.3 (± 12.8)
142.6 (± 17.4)
Army Physical Fitness Test (APFT 0–300)
207.8 (± 40.9)
206.0 (± 39.3)
215.1 (± 39.3)
188.3 (± 52.3)
211.8 (± 36.6)
Run score (range 0–100)
74 (± 22)
72.3 (± 22.1)
77.7 (± 22.0)
59.9 (± 25.7) #
76.1 (± 20.9)
Calcium Intake (mg/day)
1074 (± 463)
1167 (± 459)
1014 (± 389)
937 (± 419)
1142 (± 449)
Exercise (hrs/week) %, (n)





1–3
3.0 (4)
2.9 (3)
3.4 (1)
0 (0)
1 (1)
4–6
19.5 (26)
19.4 (38)
20.7 (6)
41.7 (5)
15.6 (15)
7–10
33.8 (45)
36.9 (24)
24.1 (7)
33.3 (4)
38.5 (37)
11+
43.6 (58)
40.8 (42)
51.7 (15)
25.0 (3)
44.8 (43)
Milk (glass/day) %, (n)





0
11.3 (15)
10.7 (11)
13.8 (15)
8.3 (1)
11.5 (11)
<1
29.3 (39)
23.3 (24)
48.3 (14)
25.0 (3)
25.0 (24)
1–2
46.6 (62)
52.4 (54)
27.6 (8)
50.0 (6)
49.0 (47)
3+
12.8 (17)
13.6 (14)
10.3 (3)
16.7 (2)
14.6 (14)
Caffeinated Drink/Day %, (n)





None
24.1(32)
22.3 (23)
27.6 (8)
33.3 (4)
20.8 (20)
1–3
69.2 (92)
70.9 (73)
65.5 (19)
58.3 (7)
70.8 (68)
3+
6.8 (9)
6.8 (7)
6.9 (2)
8.3 (1)
8.3 (8)
Alcohol Consumption %, (n)





Less than once a month
66.9 (91)
70.9 (73)
55.2 (16)
66.7 (8)
64.6 (62)
1–3 times a month
21.3 (28)
18.4 (19)
34.5 (10)
16.7 (2)
24.0 (23)
1–2 times a week
8.8 (12)
8.7 (9)
10.3 (3)
8.3 (1)
11.5 (11)
>3 times a week
1.5 (2)
1.9 (2)
0.0 (0)
8.3 (1)
0 (0)
Smokers %, (n)
3.0 (4)
2.9 (3)
3.4 (1)
8.3 (1)
2.2 (2)
History of Fracture (% yes); n
34.1 (46)
38.8 (40)
24.1 (7)
33.3 (4)
37.5 (36)

*p < 0.05 versus women with normal cycles

# p < 0.05 versus women never on oral contraceptives

Ruffing et al. Nutrition & Metabolism 2007 4:17   doi:10.1186/1743-7075-4-17