Table 1.

Characteristics of Study Subjects

	Controls		SCC cases		Total
	No.	%	No.	%	No.	%	P Value
Gender
Male	23	36.5	50	79.4	73	57.9	<0.05
Female	40	63.5	13	20.6	53	42.1
Occupational environment
Outdoor	4	6.3	25	39.7	29	23	<0.05
Indoor	59	93.7	38	60.3	97	77
Sunlight exposure (weekly)
>6 hours	3	4.8	25	39.7	28	22.2	<0.05
<6 hours	60	95.2	38	60.3	98	77.8
Family history of SCC
Positive	0	0	5	7.9	5	4	>0.05
Negative	63	100	58	92.1	121	96
Personal history of SCC
Positive	0	0	9	14.3	9	7.1	<0.05
Negative	63	100	54	85.7	117	92.9
Smoking
Yes	18	28.6	17	27	35	27.8	>0.05
No	45	71.4	46	73	91	72.2
Total	63	50	63	50	126	100