HLA-DQB1 Allele Polymorphism Associated with Oral Submucous Fibrosis in Hunan, China

Table 1

Basic characteristics of the study participants.

Characteristic variables	OSF (n = 44)	Controls (n = 44)	P	Pc
Age (years, mean ± SD)	41.86 ± 12.40	38.58 ± 12.89	0.145^a	—
Sex (M/F)	42/2	38/6	0.138^b	0.266
Betel chewer (n, %)	30 (75.00)	23 (52.27)	0.127^b	0.191
Smoker (n, %)	29 (65.91)	20 (50.00)	0.085^b	0.132
Drinker (n, %)	4 (9.09)	2 (5.00)	0.672^c	0.672

OSF, oral submucous fibrosis. Note. P_c: corrected P value; ^aindependent samples T-test; ^bPearson chi-square test; ^ccorrected with Yates continuity correction.