Table 2.

Relationship Between the Diagnosis of Tumor or No Tumor Identified by Ductoscopy and the Clinical Factors

Factors	N				χ2	p-value
	Tumor	%	No Tumor	%
Age(year)					24.896	<0.001
≤20	2	0.39	3	0.38
21–30	44	8.54	104	13.15
31–40	134	26.02	251	31.73
41–50	218	42.33	318	40.20
51–60	72	13.98	81	10.24
61–70	32	6.21	28	3.54
>70	13	2.52	6	0.76
Blank	8		19
Duration of discharge					5.445	0.142
Days	21	8.33	51	13.60
Weeks	48	19.05	67	17.87
Months	102	40.48	129	34.40
Years	81	32.14	128	34.13
Blank	271		435
Side of discharge					30.511	<0.001
Unilateral	491	93.88	678	83.70
Bilateral	32	6.12	132	16.30
Blank	0		0
Location of discharge					52.828	<0.001
Single duct	479	91.80	614	76.20
Multiple ducts	43	8.20	192	23.80
Blank	1		4
Spontaneous or not					29.698	<0.001
Nonspontaneous	135	49.63	283	70.40
Spontaneous	137	50.37	119	29.60
Blank	251		408
Color of discharge					204.717	<0.001
Red	255	49.13	151	18.80
Yellow	221	42.58	339	42.22
White or colorless	43	8.29	313	38.98
Blank	4		7
Characteristics of discharge					145.852	<0.001
Watery	20	3.84	77	9.55
Bloody	208	39.92	124	15.38
Serosity	284	54.51	490	60.79
Milky	8	1.54	109	13.52
Solid	1	0.19	6	0.74
Blank	2		4
Ductal wall					204.491	<0.001
Smooth	415	88.11	386	48.01
Rough	56	11.89	418	51.99
Blank	52		6