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Table 3 Univariate logistic regression analysis

From: Which preventive measures might protect health care workers from SARS?

Risk factors   SARS case Control OR (95% CI) P value
Number of gowns worn Single 42 189 2.12 (1.36~3.31) <0.001
  Double 49 468   
Number of multilayered cotton mask Single 32 116 2.53 (1.57~4.07) <0.001
Worn Double 59 541   
Number of pairs of gloves worn Single 81 400 5.20 (2.65~10.23) <0.001
  Double 10 257   
Frequency of wearing shoe cover Never 55 237 3.80 (2.24~6.45) <0.001
  Sometimes 8 26 5.04 (2.04~12.48) <0.001
  Often 7 50 2.29 (0.93~5.67) >0.05
  Every time 21 344 1.00  
Frequency of wearing cap Never 68 380 1.79 (1.03~3.10) <0.05
  Sometimes 3 63 0.48 (0.14~1.67) >0.05
  Often 2 34 0.59 (0.13~2.65) >0.05
  Every time 18 180 1.00  
Frequency of wearing face shield in Never 89 506 4.05 (0.54~30.34) >0.05
SARS ward Sometimes 1 107 0.22 (0.01~3.56) >0.05
  Often 0 21 --- ---
  Every time 1 23 1.00  
Frequency of wearing goggles while Never 88 483 7.83 (1.07~57.63) <0.05
performing operation for SARS patients Sometimes 2 103 0.84 (0.07~9.45) >0.05
  Often 0 28 --- ---
  Every time 1 43 1.00  
Frequency of washing uncovered skin Never 62 339 3.29 (1.29~8.43) <0.05
after caring for SARS patients Sometimes 17 142 2.16 (0.77~6.05) >0.05
  Often 7 86 1.47 (0.45~4.79) >0.05
  Every time 5 90 1.00  
Frequency of washing hands after caring Never 23 186 0.89 (0.52~1.51) >0.05
for SARS patients Sometimes 5 35 1.03 (0.38~2.75) >0.05
  Often 18 113 1.14 (0.64~2.06) >0.05
  Every time 45 323 1.00  
Frequency of washing nasal cavity after Never 66 398 3.21 (0.98~10.53) >0.05
caring for SARS patients Sometimes 20 154 2.51 (0.72~8.77) >0.05
  Often 2 47 0.82 (0.13~5.13) >0.05
  Every time 3 58 1.00  
Frequency of washing oral cavity after Never 69 376 3.26 (1.15~9.21) <0.05
caring for SARS patients Sometimes 17 147 2.05 (0.67~6.33) >0.05
  Often 1 63 0.28 (0.03~2.59) >0.05
  Every time 4 71 1.00  
Special training for SARS No 74 421 2.44 (1.41~4.23) <0.001
  Yes 17 236   
Performing tracheotomy Yes 6 11 4.15 (1.50~11.50) <0.01
  No 85 646   
Performing tracheal intubations Yes 16 17 8.03 (3.90~16.56) <0.001
  No 75 640   
Caring for "Super Spreading Patient " Yes 69 268 4.55 (2.75~7.54) <0.001
  No 22 389   
Avoiding face to face while caring for Never 40 182 1.00  
patient Sometimes 23 200 0.64 (0.36~1.10) >0.05
  Often 24 173 0.53 (0.31~0.93) <0.05
  Every time 4 113 0.16 (0.06~0.46) <0.001
Method of air ventilation in offices and ACV 20 295 1.00  
SARS wards NV 54 333 0.28 (0.14~0.54) <0.001
  NVEEF 17 29 0.17 (0.06~0.25) <0.001
Type of equipment for washing hands AT 5 125 1.00  
  NAT 85 509 4.18 (1.66~10.51) <0.001
  Others 1 23 1.09 (0.12~9.74) >0.05
  1. ACV: Artificial central ventilation; NV: Natural ventilation; NVEEF: Natural ventilation and additional electronic exhaust fan; AT: Automatic tap; NAT: Non-automatic tap