Table 1. Characteristics of RCC patients and control participants.

Variable	Case	Control	P
Total	291	463
Age(Mean±SD)	56.88±11.66	50.65±11.79	0.273
BMI(Mean±SD)	23.96±2.90	23.79±3.77	0.098
Gender
Female	99	198	0.017
Male	192	265
Smoking status
Smoking	120	169	0.193
Nosmoking	171	294
Drinking status
Drinking	53	174	<0.050
Nodrinking	238	289