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Table 3 Activity history, risk factors and protect factor of the scrub typhus in this outbreak*

From: A city park as a potential epidemic site of scrub typhus: a case–control study of an outbreak in Guangzhou, China

Exposure within one month Case (n = 29) No.(%) Control† (n = 116) No.(%) Crude OR(95% CI) Adjusted OR(95% CI)‡
Outdoor activity history     
  Travelling 24(82.8) 102(87.9) 0.7(0.2,2.0) 0.5(0.2,1.9)
    Morning exercise in park or field 22(75.9) 64(55.2) 2.6(1.0,6.4) 3.0 (1.103,8.2)
    Activity history in Xiaogang Park 21(72.4) 28(24.1) 8.3(3.8,20.7) 9.1(3.267,25.5)
    Activity history in other parks 9(31.0) 28(24.1) 1.4(0.6,3.5) 1.5(0.587,3.8)
Activity places in Xiaogang Park     
    Picnic place 9(31.0) 34(29.3) 1.1(0.4,2.6) 1.2(0.5,3.1)
    Shi Ma Gang 5(17.2) 27(23.3) 0.7(0.2,2.0) 0.7(0.2,2.3)
    Greenery pottery work ship 16(55.2) 33(28.4) 3.1(1.3,7.1) 4.6(1.7,12.5)
Risk behaviors     
    Sitting on lawn 5(18.5) 3(2.8) 8.0(1.8,35.8) 8.0(1.4,44.5)
    Fishing 6(20.7) 15(12.9) 1.8(0.6,5.0) 2.2(0.6,7.9)
    Close contact with cats 3(10.3) 5(4.3) 2.6(0.6,11.4) 2.4(0.4,13.6)
    Close contact with rats 9(31.0) 15(12.9) 3.0(1.2,7.9) 3.3(1.2,9.6)
    Sitting near rat holes 7(24.1) 9(7.8) 3.8(1.3,11.2) 6.8(1.2,38.1)
    Keep dogs 4(13.8) 14(12.1) 0.9(0.3,2.8) 0.9(0.3,3.0)
    Keep cats 3(10.3) 6(5.2) 0.5(0.1,2.0) 0.6(0.1,2.3)
Protect behaviors     
    Wearing long-sleeved clothing 8(27.6) 62(53.4) 0.3(0.1,0.8) 0.3(0.1,0.7)
    Using insect repellent 5(17.9) 22(20.2) 1.2(0.4,3.4) 1.2(0.4,4.0)
  1. *OR = odds ratio; CI = confidence interval.
  2. †Matched by age, sex.
  3. ‡Adjusted for age and gender.