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Volume 24, Number 9—September 2018
Synopsis

Distinguishing Japanese Spotted Fever and Scrub Typhus, Central Japan, 2004– 2015

Eiichiro Sando, Motoi SuzukiComments to Author , Shungo Katoh, Hiromi Fujita, Masakatsu Taira, Makito Yaegashi, and Koya Ariyoshi
Author affiliations: Nagasaki University, Nagasaki, Japan (E. Sando, M. Suzuki, S. Katoh, K. Ariyoshi); Kameda Medical Center, Kamogawa, Japan (E. Sando, M. Yaegashi); Mahara Institute of Medical Acarology, Anan, Japan (H. Fujita); Chiba Prefectural Institute of Public Health, Chiba, Japan (M. Taira)

Main Article

Table 1

Baseline characteristics of patients with JSF, ST, and nonrickettsial diseases, central Japan, 2004–2015*

             Characteristic
              JSF, 
no. (%), n = 31
              ST, 
no. (%), n = 188
              Non-R, no. (%), n = 97
              JSF vs. non-R†
             ST vs. non-R†
             JSF vs. ST‡
             OR (95% CI)
              p value
              OR (95% CI)
              p value
              OR (95% CI)
              p value
             Female sex              16 (52)              85 (45)              35 (36)              1.9 (0.8–4.3)              0.127              1.5 (0.9–2.4)              0.14              1.3 (0.6–2.8)              0.509
             Age, y, mean (SD)
              73 (10)
              65 (15)
              57 (20)
             Age group, y
             <54              1 (3)              29 (15)              43 (44)              Reference              Reference              Reference
             55–64              7 (23)              48 (26)              14 (14)              21.5 (2.4–190.3)              0.006              5.1 (2.4–10.9)              <0.001              4.2 (0.5–36.1)              0.188
             65–74              7 (23)              56 (30)              13 (13)              23.2 (2.6–205.9)              0.005              6.4 (3.0–13.7)              <0.001              3.6 (0.4–30.9)              0.239
             >75
              16 (52)
              55 (29)
              27 (28)
              25.5 (3.2–203.3)
              0.002
             3.0 (1.6–5.8)
              0.001
             8.4 (1.1–66.8)
              0.043
             No exposure              1 (3)              18 (12)              32 (46)              Reference              Reference              Reference
             Living in/ 
stepped into 
mountainous 
areas              12 (40)              58 (38)              16 (23)              24.0 (2.9–201.2)              0.003              6.4 (2.9–14.3)              <0.001              3.7 (0.5–30.6)              0.162
             Stepped into a 
bush              1 (3)              12 (8)              3 (4)              10.7 (0.5–217.2)              0.124              7.1 (1.8–28.6)              0.006              1.5 (0.1–26.4)              0.162
             Farming              16 (53)              65 (42)              14 (20)              36.6 (4.4–303.4)              0.001              8.3 (3.6–18.7)              <0.001              4.4 (0.5–35.7)              0.162

             *JSF, Japanese spotted fever; non-R, nonrickettsial diseases; OR, odds ratio; ST, scrub typhus.
             †Non-R reference.
             ‡ST reference.

Main Article

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Page updated: August 17, 2018
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