Table 3 : Chi-square analysis of differences, stratified by setting, in the
demographic and behavioral variables and the perceived willingness
to participate in a smartphone application based research project.

Variable	α2		P-value
Education	11.05	0.001*
Age at sexual debut	4.54	0.05*
Payment source	5.31	0.09*
Consistent sexual partner	3.10	0.08
Comfort with an STI (HPV) app on mobile phone	0.30	0.58
Contraception	1.05	0.59
History of HIV/STI testing	0.01	0.91
Number of sexual partners	1.03	0.59
Usual source of care	0.03	0.87
Actual receipt of HPV vaccine	0.32	0.57
Perceived availability of the HPV vaccine	3.90	0.42
Knowledge of HPV prevention methods	2.36	0.31

*Fisher's Exact Test p-value.