Table 4.
Abnormal Laboratory Findings for Fatal and Nonfatal Cases of Rocky Mountain Spotted Fever in 2 Tribal Communities in Eastern Arizona
| Laboratory Parameter | Nonfatal | Fatal | RR | 95% CI | ||
|---|---|---|---|---|---|---|
| No. (%) | Day Test First Abnormal, Median (Range) | No. (%) | Day Test First Abnormal, Median (Range) | |||
| Platelets (<130) | 34/160 (21.3) | Day 5 (2–9) | 14/15 (93.3) | Day 5.5 (2–9) | 37.04 | 5.01–274.09 |
| Sodium (<137) | 64/158 (40.5) | Day 4 (1–12) | 14/15 (93.3) | Day 6 (1–9) | 17.05 | 2.29–126.82 |
| AST (elevated) | 73/148 (49.3) | Day 4 (1–14) | 15/15 (100) | Day 7 (1–9) | Undefined | Undefined |
| ALT (elevated) | 44/147 (29.9) | Day 4.5 (1–12) | 12/15 (80.0) | Day 7 (1–9) | 7.57 | 2.23–25.72 |
| ALP (elevated) | 80/146 (54.8) | Day 4 (1–14) | 13/15 (86.7) | Day 6.5 (1–9) | 4.75 | 1.11–20.37 |
| GGT (elevated) | 7/25 (28.0) | Day 6.5 (3–14) | 2/4 (50.0) | Day 6.5 (6–7) | 2.22 | .37–13.38 |
| Total bilirubin (elevated) | 15/130 (11.5) | Day 5.5 (1–12) | 10/13 (76.9) | Day 7 (2–9) | 15.73 | 4.66–53.08 |
Abbreviations: ALP, alkaline phosphatase; ALT, alanine aminotransferase; AST, aspartate aminotransferase; CI, confidence interval; GGT, gamma-glutamyl transferase; RR, risk ratio.