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Table 3 Clinical features of all patients classified by patient groups

From: Factors associated with chemical burns in Zhejiang province, China: An epidemiological study

Variable a

All (N = 492)

Group 1b (N = 263)

Group 2 b (N = 229)

P-value

Cause of chemical burns

   

< 0.001*

   Facility problem

88(17.89%)

74(28.14%)

14(6.11%)

 

   Inappropriate operation/handling

351(71.34%)

161(61.22%)

190(82.97%)

 

   Other

53(10.77%)

28(10.64%)

25(10.92%)

 

First aid treatment

   

< 0.001*

   Without any treatment

241(48.98%)

13(4.94%)

228(99.56%)

 

   Flush with running water

231(46.95%)

230(87.45%)

1(0.44%)

 

   Using counteractive agent

17(3.46%)

17(6.47%)

0(0%)

 

   Other

3(0.61%)

3(1.14%)

0(0%)

 

Total body surface area burned (%)

4(1.5,8)

5(3,10)

2(1,7)

< 0.001*

Inhalation

   

0.007*

   No

450(91.65%)

230(87.78%)

220(96.07%)

 

   Slight

22(4.48%)

18(6.87%)

4(1.75%)

 

   Moderate

14(2.85%)

10(3.82%)

4(1.75%)

 

   Severe

5(1.02%)

4(1.53%)

1(0.43%)

 

Chemical poisoning

   

0.032*

   No

482(97.97%)

254(96.58%)

228(99.56%)

 

   Slight

4(0.81%)

4(1.52%)

0(0%)

 

   Moderate

4(0.81%)

4(1.52%)

0(0%)

 

   Severe

2(0.41%)

1(0.38%)

1(0.44%)

 

Pre-job training†

   

< 0.001*

   Yes

137(31.64%)

115(49.78%)

22(10.89%)

 

   No

296(68.36%)

116(50.22%)

180(89.11%)

 

Prognoses

   

0.078

   Cured

401(81.51%)

207(78.71%)

194(84.72%)

 

   Improvement

84(17.07%)

54(20.53%)

30(13.10%)

 

   Hospital transfer

3(0.61%)

1(0.38%)

2(0.87%)

 

   Discharged against advice

1(0.20%)

0(0%)

1(0.44%)

 

   Death

3(0.61%)

1(0.38%)

2(0.87%)

 
  1. a Burned area was presented as median (IQR) and compared by Mann-Whitney U test; categorical variables were presented as count (percentage) and tested by Fisher's exact test
  2. b Patients were classified into two groups according to awareness of correct immediate onsite treatment required (Group 1) or lack of awareness of immediate treatment required (Group 2)
  3. *P < 0.05 indicated significant differences between groups
  4. †Fifty nine patients who were not injured at work were excluded from this analysis.