Table 2.
Proportion of Participating Households Reporting Tick Encounters or Physician-Diagnosed Tick-borne Disease, by Treatment Group, Study Year, and Study Site
| Outcome, Year(s), Site |
Acaricide | Placebo | P Value |
|---|---|---|---|
| Ticks crawling | |||
| 2011 | 185/762 (24.3) | 209/769 (27.2) | .19 |
| 2012 | 139/541 (25.7) | 150/518 (29.0) | .23 |
| Overall | 324/1303 (24.9) | 359/1287 (27.9) | .08 |
| CT | 133/474 (28.1) | 157/491 (32.0) | |
| MD | 68/319 (21.3) | 60/289 (20.8) | |
| NY | 123/510 (24.1) | 142/507 (28.0) | |
| Ticks attached | |||
| 2011 | 127/762 (16.7) | 145/769 (18.9) | .26 |
| 2012 | 86/541 (15.9) | 84/518 (16.2) | .89 |
| Overall | 213/1303 (16.3) | 229/1287 (17.8) | .33 |
| CT | 78/474 (16.5) | 103/491 (21.0) | |
| MD | 35/319 (11.0) | 30/289 (10.4) | |
| NY | 100/510 (19.6) | 96/507 (18.9) | |
| Self-reported illness | |||
| 2011 | 27/739 (3.7) | 25/755 (3.3) | .72 |
| 2012 | 14/534 (2.6) | 14/513 (2.7) | .91 |
| Overall | 41/1273 (3.2) | 39/1268 (3.0) | .78 |
| Verified illness | |||
| 2011 | 13/739 (1.8) | 14/755 (1.9) | .89 |
| 2012 | 6/534 (1.1) | 6/513 (1.2) | .94 |
| Overall | 19/1273 (1.5) | 20/1268 (1.6) | .90 |
Data are no. (%) of households with specified characteristics.