Table 1.

Meta-analysis summary of the examined risk factors for prostate cancer

Occupational risk factor	No. of studies	No. of cases	MetaRR	95% CI	Q	P-value	I2 (%)
Pesticides	18	3,474	1.15	1.01–1.32	110	<0.001	84
Coh	13	3,067	1.13	0.97–1.32	96	<0.001	86
CC	5	407	1.26	0.86–1.83	15	0.006	33
Organochlorines	17	2,730	1.08	1.03–1.14	43	0.49	0
Coh	10	1,003	1.12	1.05–1.19	13	0.6	0
CC	7	1,727	0.99	0.89–1.10	26	0.53	0
Chromium	8	964	1.19	1.07–1.34	10	0.18	31
Shiftwork	6	1,355	1.25	1.05–1.49	36	<0.000	78
Coh	4	861	1.14	0.98–1.32	11	0.052	55
CC	2	494	1.50	0.91–2.48	21	<0.000	90
Flight personnel	3	180	1.26	0.90–1.76	8.9	0.031	66
Pilots	3	163	1.41	1.02–1.94	5.4	0.07	63
Occupational physical activity	18	3,417	0.90	0.80–1.02	55	<0.000	69
Coh	10	1,684	0.87	0.80–0.94	8.5	0.48	0
CC	8	1,733	0.91	0.68–1.20	44	<0.000	84
Whole body vibration	10	6,224	1.03	0.98–1.09	66	<0.000	77
Coh	5	4,768	1.01	0.98–1.05	19	0.004	69
CC	5	1,456	1.31	1.00–1.72	47	<0.000	83
Farming, farmers	26	66,749	0.99	0.95–1.02	118	<0.001	79
Coh	15	65,448	0.97	0.94–1.00	90	<0.001	58
CC	11	1,301	1.04	0.90–1.21	21	0.021	33
Organophosphates	7	1,350	0.98	0.87–1.11	8	0.44	0
Coh	4	901	0.97	0.82–1.14	1.1	0.77	0
CC	3	449	0.99	0.78–1.25	7	0.15	41
Carbamates	5	520	1.05	0.89–1.24	8	0.22	27
Triazines	4	471	1.02	0.92–1.14	7	0.13	45
Cadmium	7	71	1.12	0.82–1.53	6	0.42	0
Cutting fluids	8	446	1.03	0.92–1.16	9	0.42	0
Coh	5	285	1.03	0.88–1.21	7	0.29	18
CC	3	161	0.89	0.66–1.21	0.9	0.64	9
Acrylonitrile	4	54	0.93	0.71–1.21	0.41	0.94	0
Rubber manufacturing	15	923	0.98	0.87–1.09	0.33	0.005	55
Ionizing radiation	9	1,624	1.07	0.97–1.17	20	0.009	61

MetaRR, meta relative risk; CI, confidence interval; Coh, cohort study; CC, case control study.