表 2.

经列联表χ²分析筛选后可纳入多因素回归分析的变量

Factors included in the Logistic regression model after Chi-square test

	Case group	Control group	χ 2	P
*P＜0.05; # P＜0.01.
G3 tumor，n	138	101
Drink at least once every hour, n(%)	44 (31.88)	45 (44.55)	4.006	0.045*
Drink over 200 mL water when get up, n(%)	102 (73.91)	82 (81.19)	1.742	0.187
Smoking history, n(%)	36 (26.07)	38 (37.62)	3.631	0.057
Family history of cancer, n(%)	48 (34.78)	25 (24.75)	2.766	0.096
Multifocal tumor，n	39	200
Time of drinking
When thirsty, n(%)	13 (33.33)	93 (46.50)	2.292	0.130
Drinking water intentionally, n(%)	26 (66.67)	107 (53.50)
Drink at least once every hour during the daytime, n(%)	19 (48.72)	60 (35.00)	2.628	0.105
Drink over 100 mL water every time, n(%)	28 (71.80)	162 (81.19)	1.697	0.193
Drink water at night, n(%)	13 (33.33)	93 (46.50)	2.292	0.130
Drink over 200 mL tea every day, n(%)	21 (53.85)	75 (37.50)	3.628	0.057
Tumor located in renal pelvic，n	127	112
Time of drinking
When thirsty, n(%)	63 (49.61)	43 (38.40)	3.032	0.082
Drinking water intentionally, n(%)	64 (50.39)	69 (61.60)
Drink over 200 mL tea every day, n(%)	35 (35.43)	51 (45.54)	2.527	0.112
Paying attention to daily water intakes, n(%)	85 (66.93)	55 (49.11)	7.791	0.005#
Family history of cancer, n(%)	48 (37.80)	25 (22.32)	6.717	0.010*
Tumor located in ureter，n	132	107
Time of drinking
When thirsty, n(%)	49 (31.12)	57 (53.27)	6.245	0.012*
Drinking water intentionally, n(%)	83 (62.88)	50 (46.73)
Drink at least once every hour during the daytime, n(%)	55 (41.67)	34 (31.78)	2.474	0.116
Drink water at night, n(%)	51 (38.64)	55 (51.40)	3.902	0.048*
Drink over 200 mL tea every day, n(%)	64 (48.48)	32 (29.91)	8.487	0.004*
Paying attention to daily water intakes, n(%)	66 (50.00)	74 (69.16)	8.940	0.003#
Family history of cancer, n(%)	34 (25.76)	39 (36.45)	3.184	0.074