Volume 10, Number 8—August 2004
Dispatch
Spotted-Fever Group Rickettsia in Dermacentor variabilis, Maryland
Nicole C. Ammerman*, Katherine I. Swanson*, Jennifer M. Anderson*, Timothy R. Schwartz*, Eric C. Seaberg*, Gregory E. Glass*, and Douglas E. Norris*
Table 2
Univariate odds ratio (OR) associated with any Rickettsia organism and with R. montanensis
| Variable | Rickettsia genus–positive |
R. montanensis–positive |
||||
|---|---|---|---|---|---|---|
| OR | 95% CIa | p value | OR | 95% CI | p value | |
| Sex |
||||||
| Female |
1.0 |
reference |
1.0 |
reference |
||
| Male |
0.94 |
0.41–2.16 |
0.890 |
0.98 |
0.35–2.75 |
0.967 |
| County of collection |
||||||
| Baltimore |
1.02 |
0.29–3.57 |
0.969 |
0.57 |
0.16–2.09 |
0.397 |
| All other counties |
1 |
reference |
1.0 |
reference |
||
| Month collected: |
||||||
| April |
1.0 |
reference |
1.0 |
reference |
||
| May |
0.96 |
0.30–3.12 |
0.951 |
0.37 |
0.08–1.84 |
0.227 |
| June |
0.52 |
0.11–2.58 |
0.425 |
0.26 |
0.03–2.13 |
0.209 |
| July/August | 4.14 | 1.49–11.47 | 0.006 | 1.87 | 0.57–6.16 | 0.301 |
aCI, confidence interval.
Page created: March 01, 2011
Page updated: March 01, 2011
Page reviewed: March 01, 2011
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.