Variable & Category | Proportion of person-time in each category | Crude rate of physician visitsa per 100,000 person-years [95% CI] | Crude rate of hospitalizationsb per 100,000 person-years [95% CI] |
---|---|---|---|
Sex | |||
   Female | 50.4% | 1,398 [1351, 1442] | 35.8 [28.6, 43.0] |
   Male | 49.6% | 1,310 [1265, 1354] | 31.8 [24.9, 38.5] |
Age | |||
   < 1 | 0.3% | 7,848 [6484, 9175] | 119 [0, 284] |
   1 - 4 | 5.0% | 6,607 [6286, 6928] | 315 [ 249, 381] |
   5 - 9 | 7.4% | 2,164 [2014, 2314] | 55.8 [33.0, 78.5] |
   10 - 19 | 16.2% | 902 [838, 967] | 21.9 [12.0, 31.6] |
   20 - 29 | 11.5% | 1,548 [1448, 1648] | 11.3 [3.0, 19.9] |
   30 - 39 | 15.2% | 1,190 [1114, 1266] | 6.2 [0.8, 11.6] |
   40 - 49 | 17.5% | 770 [713, 827] | 8.8 [2.7, 14.6] |
   50 - 59 | 12.2% | 653 [591, 716] | 7.7 [1.0, 14.7] |
   60 - 69 | 7.2% | 756 [667, 843] | 24.1 [8.3, 39.8] |
   ≥ 70 | 7.5% | 1,095 [991, 1196] | 38.3 [19.0, 57.8] |
Season | |||
   Spring | 25.5% | 1,566 [1496, 1631] | 56.2 [43.5, 68.7] |
   Summer | 25.6% | 1,288 [1229, 1351] | 21.2 [13.5, 29.0] |
   Fall | 25.2% | 1,128 [1070, 1186] | 19.3 [11.9, 26.7] |
   Winter | 23.7% | 1,438 [1369, 1503] | 38.7 [27.9, 49.7] |
Duration of Residence in the Township | |||
   < 1 year | 15.0% | 2,325 [2219, 2433] | 65.7 [47.8, 83.5] |
   1 - 2 years | 17.2% | 1,745 [1657, 1830] | 46.0 [32.2, 60.0] |
   2 - 3 years | 15.3% | 1,226 [1150, 1304] | 33.2 [20.7, 45.7] |
   3 - 6 years | 30.8% | 923 [876, 971] | 21.9 [14.6, 28.9] |
   ≥ 6 years | 15.5% | 712 [652, 769] | 13.1 [5.4, 21.0] |
   Unknown | 6.2% | 1,938 [1786, 2090] | 37.2 [16.1, 58.0] |
Household income quintile of the neighborhood | |||
   Low | 4.7% | 1,482 [1329, 1634] | 63.5 [32.5, 94.8] |
   Medium Low | 10.1% | 1,559 [1452, 1665] | 40.9 [23.7, 57.7] |
   Medium | 24.1% | 1,256 [1194, 1319] | 33.6 [23.6, 43.7] |
   Medium High | 43.1% | 1,391[1340, 1438] | 29.6 [22.5, 36.6] |
   High | 18.0% | 1,252 [1178, 1322] | 32.1 [20.9, 43.6] |
Drinking Water Disinfection | |||
   Chlorination | 38.7% | 1,343 [1293, 1394] | 27.7 [20.7, 35.1] |
   None | 61.3% | 1,358 [1319, 1400] | 37.6 [30.9, 44.2] |
Water System or Subsystem | |||
   Municipal A*: mixed surface (66-96%) & well | 27.2% | 1,905 [1832, 1977 | 28.8 [20.0, 37.3] |
   Municipal B*: mixed surface (66-96%) & well | 8.6% | 1,741 [1619, 1865] | 29.9 [14.3, 45.8] |
   Municipal C*: mixed surface (12-63%) & well | 16.2% | 949 [882, 1013] | 23.4 [13.1, 33.6] |
   Municipal D*: well, with added surface water in emergencies & summer | 8.8% | 1,252 [1150, 1355] | 43.1 [24.1, 61.7] |
   Municipal E*: well, with added surface water in emergencies & summer | 1.5% | 829 [627, 1030] | 50.7 [1.0, 100] |
   Municipal F: well, large systems | 14.9% | 1,340 [1257, 1421] | 54.4 [38.1, 70.6] |
   Municipal G: well, small systems | 0.4% | 412 [142, 679] | 0 [0, 216] |
   Community well | 1.7% | 949 [747, 1154] | 11.3 [0, 33.5] |
   Private well | 20.7% | 949 [887, 1003] | 32.9 [22.1, 43.5] |
Sewage Disposal | |||
   Municipal sewer user | 52.8% | 1,701[1653, 1751] | 39.4 [32.3, 46.9] |
   Private sewer user | 47.3% | 971 [930, 1008] | 27.0 [20.7, 33.6] |
Land Use | |||
   Agricultural | 8.3% | 1,059 [962, 1157] | 32.1 [15.2, 48.7] |
   Residential | 91.7% | 1,380 [1347, 1413] | 33.9 [28.8, 39.1] |