Volume 9, Number 12—December 2003
Research
Human Monocytotropic Ehrlichiosis, Missouri
Juan P. Olano*
, Edwin Masters†, Wayne Hogrefe‡, and David H. Walker*
, Edwin Masters†, Wayne Hogrefe‡, and David H. Walker*Table 3
Comparison of selected clinical features and laboratory data between patients with human monocytotropic ehrlichiosis (HME) (case-patient group) and noncase group (control group). Cape Girardeau, Missouri, 1997–1999
| Clinical feature | HME case-patient group N (%) | Control group N (%) | p value |
|---|---|---|---|
| Fever |
29(100) |
20(100) |
NA |
| Headache |
21(72) |
14(70) |
0.89a |
| Dizziness |
6(21) |
2(7) |
0.44b |
| Myalgia/arthralgia |
20(69) |
10(50) |
0.29a |
| Chills |
13(45) |
7(35) |
0.69a |
| Weakness |
11(38) |
3(15) |
0.15a |
| Nausea |
11(38) |
3(15) |
0.13a |
| Vomiting |
2(7) |
2(10) |
1.00b |
| Diarrhea |
3(10) |
2(10) |
1.00b |
| Abdominal pain |
2(7) |
1(5) |
1.00b |
| Cough |
7(24) |
0(0) |
0.03b |
| Sore throat |
6(21) |
0(0) |
0.07b |
| Rash |
6(21) |
0(0) |
0.07b |
| Stiff neck |
6(21) |
0(0) |
0.07b |
| Confusion |
2(7) |
0(0) |
0.50b |
| Laboratory data |
Mean ± SD/median |
Mean ± SD/median |
p value |
| Age |
48.6 ± 17.5 |
35.7 ± 19.9 |
0.02c |
| Leukocytes x 109 cells/L |
4.67 |
6.25 |
0.04d |
| Neutrophils x 109 cells/L |
2645 |
3810 |
0.03d |
| Lymphocytes x 109 cells/L |
1677 |
1897 |
0.36d |
| Platelets x 109 cells/L |
172± 101.8 |
250.8 ± 137.5 |
0.06c |
| Aspartate aminotransferase (U/L) | 63 | 32 | 0.84d |
aCalculated by using Fisher exact test.
bCalculated by using chi-square test.
cCalculated by using t-test.
dCalculated by using Mann-Whitney rank sum test.
