Prevalence and risk factors of gallbladder polypoid lesions in Chinese petrochemical employees

Table 2 Prevalence, age distribution and gender of patients with post-cholecystectomy, gallstones and polypoid lesions of the gallbladder in 10461 examinees n (%)

Age group (yr)	Examinees		Post-cholecystectomy			Gallstones			PLGs
	Male	Female	Male	Female	P value	Male	Female	P value	Male	Female	P value
20-29	551	113	0 (0.0)	0 (0.0)	-	4 (0.7)	0 (0.0)	1.000	22 (4.0)	1 (0.9)	0.153
30-39	2221	736	4 (0.2)	6 (0.8)	0.019	40 (1.8)	22 (3.0)	0.051	201 (9.0)	31 (4.2)	< 0.001
40-49	1903	896	9 (0.5)	4 (0.4)	0.322	79 (4.2)	50 (5.6)	0.093	190 (10.0)	49 (5.5)	< 0.001
50-59	1506	776	6 (0.4)	18 (2.3)	< 0.001	94 (6.2)	53 (6.8)	0.588	142 (9.4)	53 (6.8)	0.035
60-69	621	374	11 (1.8)	11 (2.9)	0.223	58 (9.3)	42 (11.2)	0.337	38 (6.1)	15 (4.0)	0.151
≥ 70	529	235	6 (1.1)	15 (6.4)	< 0.001	68 (12.9)	33 (14.0)	0.545	27 (5.1)	8 (3.4)	0.300
Total	7331	3130	36 (0.5)	54 (1.7)	< 0.001	343 (4.7)	200 (6.4)	< 0.001	620 (8.5)	157 (5.0)	< 0.001

PLG: Polypoid lesions of the gallbladders.