Table 3.
Cohort characteristics and reported symptoms of case cohorts in Lyme-endemic communities, July 2009.
| EM Cases (n = 32) |
PTLS-c (n = 19) |
PTLS-p ≤2 Years (n = 148) |
PTLS-p >2 Years (n = 168) |
Community Controls (n = 41) |
|
|---|---|---|---|---|---|
| Mean age (±SD) | 56.3 (±12.9) | 57.8 (±9.7) | 53.5 (±13.1) | 56.0 (±12.4) | 57.0 (±10.4) |
| Gender (% male) | 50.0 | 42.1 | 40.5 | 34.5 | 51.2 |
| % Reporting | |||||
| Past positive Lyme test | 28.1 ** | 57.9 *** | 54.7 *** | 44.6 *** | 0.0 |
| Past other tick-borne disease | 3.1 | 5.3 | 19.6 * | 16.7 * | 2.4 |
| ≥1 tick bite in last year | 75.0 * | 31.6 | 54.1 | 32.7 | 41.5 |
| Symptoms of recent Lyme disease episode from survey questionnaire (% with symptoms) | |||||
| Joint pain | 71.9 | 84.2 | 87.2 | 81.5 | |
| Fatigue | 71.9 | 78.9 | 87.2 | 85.7 | |
| Headache | 71.9 | 47.4 | 59.5 | 62.5 | |
| Stiff neck | 53.1 | 57.9 | 63.5 | 60.7 | |
| Shooting/stabbing pains | 21.9 | 31.6 | 33.1 | 41.1 | |
| Mental confusion/fog | 40.6 | 78.9 | 60.1 | 64.3 | |
| Erythema migrans-like rash | 100.0 | 68.4 | 42.6 | 48.8 | |
| Joint swelling | 31.3 | 42.1 | 40.5 | 38.1 | |
| Light/sound sensitive | 18.8 | 26.3 | 28.4 | 34.5 | |
| Fever > 100 °F | 46.9 | 42.1 | 21.6 | 27.4 | |
| Cranial nerve palsy | 6.3 | 31.6 | 2.7 | 6.5 | |
| Heart block | 0 | 5.3 | 2.7 | 1.2 | |
* p < 0.05, ** p < 0.01, *** p < 0.001; chi-square with Yates correction for continuity, community controls as reference group.