Table 1. Demographic data for study participants stratified by cancer history and hormonal contraceptive use.

Data presented per subject. Subjects with recent exposure to hormonal contraception during at least one visit were classified as hormonal contraceptive users. Demographic characteristics were compared using the Student's t test, Wilcoxon rank-sum test, and Kruskal-Wallis one-way analysis of variance for continuous variables and Pearson's Chi-squared test and Fisher's exact test for categorical variables.

	Cancer Survivors			Healthy Controls			Four way group comparison
Subject Characteristics	HC Users (n=42)	HC Non-users (n=84)	P value	HC Users (n=8)	HC Non-users (n=115)	P value	P value
Age at enrollment (years) ^φ	23 (20,27) (16-35)	25 (20,31) (15-39)	0.19	28.5 (25.5,30) (21-34)	26 (22,29) (14-39)	0.219	0.075
Visits per subject, ^φ	2 (1,3) (1-8)	1 (1,3) (1-6)	0.411	2 (1,3) (1-6)	1 (1,3) (1-6)	0.093	0.316
Length of follow-up (years) ^φ	1.2 (0,3.1) (0-7.4)	1 (0,2.6) (0-6.2)	0.434	2 (0.5,4.0) (0-4.9)	1 (0,2.5) (0-5.5)	0.163	0.471
BMI at enrollment (kg/m²) ^φ	22.6 (19.4,24.4) (16.8-34.7)	23.7 (21.4,25.7) (15.2-50.6)	0.036	22.2 (20.0,27.9) (19.6-43.9)	23.3 (21.2,26.7) (16.4-54.3)	0.704	0.117
Caucasian Race, n (%)	41 (97.6%)	76 (90.5%)	0.267	6 (75.0%)	92 (80.0%)	0.664	0.008
Smoking at enrollment, n (%)	2 (4.8%)	3 (3.6%)	1	0 (0.0%)	13 (11.5%)	0.597	0.186
Nulligravid, n (%)	33 (78.6%)	53 (63.9%)	0.094	5 (62.5%)	80 (69.6%)	0.702	0.37
First visit conducted during early follicular phase, n (%)	78.60%	89.30%	0.105	100%	100%	1	<0.001

^φ

=Results reported as median, interquartile range, and range