Table 1.
Summary of atrazine data for Indiana CWSs included in the study.
| CWS | No. of yearsa | No. of births | Atrazine concentrationsb |
Mean (± SD) no. of days atrazine |
Preterm prevalence (95% CI)c | SGA prevalence (95% CI)c | ||
|---|---|---|---|---|---|---|---|---|
| Annual median | Annual maximum | > 0.2 μg/L | > 0.5 μg/L | |||||
| Batesville | 7 | 233 | 0.996 ± 0.278 | 1.988 ± 0.774 | 18 ± 13 | 15 ± 10 | 7.30 (6.85–7.74) | 6.01 (5.64–6.38) |
| Bedford | 4 | 255 | 0.101 ± 0.124 | 5.282 ± 7.643 | 7 ± 11 | 4 ± 7 | 8.24 (7.76–8.71) | 8.24 (7.76–8.71) |
| Bloomington | 9 | 1,849 | 0.058 ± 0.170 | 0.096 ± 0.207 | 11 ± 30 | 0 | 6.60 (6.45–6.74) | 8.49 (8.31–8.67) |
| Dubois | 3 | 134 | 0.080 ± 0.026 | 0.110 ± 0.039 | 0 | 0 | 9.70 (8.94–10.5) | 9.70 (8.94–10.5) |
| Evansville | 4 | 2,296 | 0.158 ± 0.073 | 0.987 ± 0.265 | 63 ± 60 | 26 ± 28 | 6.79 (6.66–6.93) | 14.1 (13.8–14.3) |
| Ft. Wayne | 9 | 16,393 | 0.194 ± 0.090 | 4.290 ± 2.108 | 265 ± 218 | 129 ± 100 | 7.58 (7.52–7.63) | 13.7 (13.6–13.8) |
| Indiana American Northwest | 1 | 692 | 0.001 | 0.001 | 0 | 0 | 3.90 (3.76–4.04) | 12.9 (12.4–13.3) |
| Indiana American Kokomo | 1 | 59 | 0.305 | 0.856 | 106 ± 149 | 13 ± 18 | 11.9 (10.5–13.2) | 5.08 (4.46–5.71) |
| Indiana American Richmond | 2 | 324 | 0.261 ± 0.071 | 0.490 ± 0.014 | 0 | 0 | 12.3 (11.7–12.9) | 12.3 (11.7–12.9) |
| Jasper | 8 | 280 | 0.214 ± 0.098 | 2.623 ± 2.882 | 12 ± 12 | 5 ± 6 | 7.14 (6.75–7.54) | 8.21 (7.76–8.66) |
| Logansport | 2 | 216 | 0.120 ± 0.087 | 5.936 ± 8.069 | 17 ± 28 | 6 ± 10 | 6.48 (6.07–6.89) | 13.9 (13.1–14.7) |
| Michigan City | 3 | 848 | 0.011 ± 0.008 | 0.028 ± 0.017 | 0 | 0 | 7.19 (6.96–7.42) | 17.0 (16.5–17.5) |
| Mitchell | 3 | 64 | 0.066 ± 0.061 | 1.045 ± 1.700 | 2 ± 4 | 2 ± 4 | 9.38 (8.31–10.4) | 9.38 (8.31–10.4) |
| Mt. Vernon | 3 | 90 | 0.087 ± 0.032 | 0.965 ± 0.636 | 4 ± 3 | 2 ± 3 | — | 6.67 (6.01–7.32) |
| Northwest Indiana | 1 | 165 | 0.001 | 0.001 | 0 | 0 | 5.45 (5.05–5.86) | 14.5 (13.6–15.5) |
| Oakland City | 3 | 22 | 0.154 ± 0.063 | 0.193 ± 0.086 | 0 | 0 | 9.09 (7.33–10.9) | — |
| Salem | 4 | 100 | 0.294 ± 0.338 | 0.604 ± 0.506 | 6 ± 8 | 0 | 5.00 (4.53–5.48) | 12.0 (10.9–13.1) |
| Scottsburg | 4 | 65 | 0.435 ± 0.535 | 0.647 ± 0.549 | 4 ± 6 | 2 ± 3 | 9.23 (8.19–10.3) | 10.8 (9.58–12.0) |
| Stucker Fork | 4 | 69 | 0.094 ± 0.083 | 3.379 ± 4.096 | 3 ± 3 | 0 | 8.70 (7.74–9.65) | 18.8 (17.0–20.7) |
—, no data.
a
Includes only years with complete atrazine time series.
b
Values represent the mean of annual median and maximum concentrations.
c
Prevalence values in percentage (per 100).