Table 1.
Seasonal mean values, measured in weeks, for the 12 states (grouped into four regions) included in our analysis*
| State (Region) | Years | Start (SD) | Peak (SD) | End (SD) | Duration (SD) |
|---|---|---|---|---|---|
| North | 21 | 22.1 (1.1) | 27.6 (0.8) | 35.5 (1.1) | 13.4 (1.5) |
| Maine | 6 | 22.0 (1.8) | 27.8 (1.2) | 36.5 (1.0) | 14.5 (2.1) |
| Massachusetts | 13 | 22.2 (0.7) | 27.5 (0.7) | 35.1 (1.0) | 12.9 (1.0) |
| New Hampshire | 2 | 22.0 (1.4) | 27.5 (0.7) | 35.5 (0.7) | 13.5 (2.1) |
| East | 66 | 21.3 (1.2) | 27.1 (0.7) | 35.1 (0.9) | 13.8 (1.7) |
| Connecticut | 16 | 21.9 (1.0) | 27.2 (0.4) | 34.6 (0.7) | 12.7 (1.4) |
| Rhode Island | 14 | 22.1 (1.1) | 27.6 (0.9) | 35.1 (0.8) | 13.1 (1.2) |
| New Jersey | 7 | 20.7 (1.4) | 27.0 (0.6) | 35.9 (1.3) | 15.1 (2.6) |
| New York | 15 | 21.1 (0.9) | 27.2 (0.4) | 35.5 (0.7) | 14.3 (1.4) |
| Pennsylvania | 14 | 20.2 (0.9) | 26.4 (0.5) | 34.9 (0.9) | 14.6 (1.3) |
| South | 26 | 18.6 (1.3) | 25.4 (0.6) | 35.5 (2.9) | 16.9 (3.4) |
| Maryland | 16 | 19.2 (0.9) | 25.6 (0.5) | 34.9 (1.9) | 15.8 (2.4) |
| Virginia | 10 | 17.7 (1.3) | 25.1 (0.7) | 36.4 (4.0) | 18.7 (4.0) |
| Midwest | 32 | 22.3 (1.6) | 27.6 (1.5) | 34.8 (1.8) | 12.4 (2.0) |
| Minnesota | 16 | 23.1 (1.5) | 27.7 (1.2) | 34.3 (1.2) | 11.2 (1.6) |
| Wisconsin | 16 | 21.6 (1.4) | 27.4 (1.7) | 35.3 (2.1) | 13.7 (1.4) |
| Mean (SD) | 145 | 21.2 (1.8) | 27.0 (1.2) | 35.2 (1.7) | 14.0 (2.6) |
*
Years are the number of years between 1992 and 2007 where > 100 Lyme disease cases occurred in a state and included in analysis. Start, peak, and end are the week when the Lyme disease season starts, reaches its peak, and ends, respectively; duration is the length of the Lyme disease season in weeks. Numbers in parentheses are standard deviations (in weeks) for each variable.