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Table 1 PCE exposure history of breast cancer cases and controls

From: Risk of breast cancer following exposure to tetrachloroethylene-contaminated drinking water in Cape Cod, Massachusetts: reanalysis of a case-control study using a modified exposure assessment

 

PCE-exposed cases

PCE-exposed controls

Latency period (years)

Prior analysis (n = 930)

Current analysis (n = 920)

Prior analysis (n = 1302)

Current Analysis (n = 1293)

0

191 (20.5%)

449 (48.8%)

217 (16.7%)

648 (50.1%)

5

154 (16.6%)

399 (43.4%)

163 (12.5%)

552 (42.7%)

7

128 (13.8%)

365 (39.7%)

135 (10.4%)

496 (38.4%)

9

111 (11.9%)

319 (34.7%)

110 (8.4%)

436 (33.7%)

11

86 (9.2%)

281 (30.5%)

83 (6.4%)

376 (29.1%)

13

65 (7.0%)

242 (26.3%)

52 (4.0%)

325 (25.1%)

15

44 (4.7%)

186 (20.2%)

35 (2.7%)

229 (17.7%)

17

21 (2.3%)

130 (14.1%)

21 (1.6%)

141 (10.9%)

19

9 (1.0%)

84 (9.1%)

9 (0.7%)

78 (6.0%)