Table 3.

The association of OL clinical basic characteristics and 5-ALA-PDT therapeutic effect (n=31)

Basic clinical characteristics		Therapeutic effect			Chi-squared value	p-value
		Cases (n)	Effective cases (n)	Effective invalid cases rate (%)
*Expressed using corrected chi-squared; **expressed using Fisher’s exact probability method; & statistically significant, p<0.05.
Gender	Male	18	3	85.7	-	0.533**
	Female	10	0	100
Age in years	<50	13	2	86.7	0.003	0.953*
	≥50	15	1	93.8
Lesion location	Ventral tongue	17	0	100	10.473	0.003&**
	Floor of the mouth	0	2	0
	Other	11	1	91.7
Pathological characteristics	Simple hyperplasia	22	1	95.7	4.147	0.156**
	Mild epithelial dysplasia	4	2	66.7
	Moderate epithelial dysplasia	2	0	100
Lesion classification	Homogeneous	22	3	88	-	1.000**
	Non-homogeneous	6	0	100
Smoking history	Yes	21	3	87.5	-	1.000**
	No	7	0	100
Drinking history	Yes	20	3	87	-	0.550**
	No	8	0	100
Chewing betel nut	Yes	8	1	88.9	-	1.000**
	No	20	2	90.9
Lesion size	<2 cm2	13	1	92.9	0	1.000*
	≥2 cm2	15	2	88.2
Clinical symptoms (side effect)	Yes	28	1	96.6	-	0.006&**
	No	0	2	0