Table 2.

Descriptive statistics of the study population stratified by sex.

	Females			Males
Variable	N	Mean (SD)	Median (Range)	N	Mean (SD)	Median (Range)
Age (years)	178	19.8 (0.7)	19.7 (18.9, 22.1)	146	19.8 (0.7)	19.7 (18.6, 22.1)
Height (cm)	178	166.4 (6.9)	166.3 (44.3, 181.0)	146	180.2 (7.7)**	179.8 (162.0, 200.9)
Weight (kg)	178	70.6 (19.3)	65.3 (44.5, 159.8)	146	84.7 (19.9)**	80.0 (51.3, 166.0)**
Maturity offset (yrs.)	177	7.9(1.0)	7.9(4.6,10.8)	144	6.1(1.1)**	5.9 (3.6,9.4)
HEI-2010 score (0-100)	177	59.5 (12.2)	60.5 (30.3, 90.8)	146	53.9 (11.8)**	53.7 (27.5, 87.8)
PAQ score	174	2.08 (0.72)	2.04 (1.00, 4.16)	139	2.44 (0.83)**	2.48 (1.00, 4.43)
Calcium (mg)	177	1004.4 (580.5)	865.9 (3.9, 3116.9)	146	1924.4 (1534.9)**	1582.0 (176.7, 9613.7)**
Protein (g)	177	58.2 (30.1)	51.1 (4.8, 227.1)	146	122.3 (78.0)**	104.6 (14.3, 506.0)**
Period-Specific Fluoride Intake (AUC mg F)
0 to 8.5 years	160	0.63 (0.27)	0.57 (0.17, 2.36)	135	0.69 (0.27)	0.66 (0.12, 1.55)*
8.5 to 14 years	149	0.68 (0.34)	0.62 (0.17, 2.57)	123	0.79 (0.35)**	0.73 (0.24, 2.21)**
14 to 19 years	137	0.80 (0.42)	0.73 (0.16, 2.48)	107	1.00 (0.51)**	0.89 (0.22, 3.03)**
0 to 19 years	143	0.69 (0.27)	0.64 (0.28, 2.33)	113	0.82 (0.33)**	0.74 (0.21, 1.92)**

^*p-value < 0.05,

^**p-value < 0.01 for sex comparisons; t-tests were used for normally distributed variables; both t-tests and non-parametric Wilcoxon rank sum tests were used for variables with skewed distribution.

PHV = peak height velocity; HEI-2010 = healthy eating index version 2010; PAQ = physical activity questionnaire; AUC

Maturity offset = (age-(best estimate of age of peak height velocity))

F = fluoride