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Table 3 Distribution of oral hard/soft tissue indices between acid exposed and control group

From: Examining relationship between occupational acid exposure and oral health in workplace

Group Control group
N = 157
Exposed group
N = 152
P
Value
  No Yes No Yes  
Oral hard tissue
Tooth erosion Level 0 Level 1 to 3 Level 0 Level 1 to 3  
66.7% 33.3% 74.8% 25.2% 0.12
DMFT DMFT = 0 DMFT> 0 DMFT = 0 DMFT> 0  
5.7% 94.3% 15.8% 84.2% < 0.01**
Oral soft tissue
CPITN CPITN = 0 CPITN> 0 CPITN = 0 CPITN> 0  
12.4% 87.6% 4.6% 95.4% 0.02*
LA LA = 0 LA > 0 LA = 0 LA > 0  
59.5% 40.5% 42.4% 57.6% < 0.01**
  1. #p < 0.05 by chi-square test between exposed and control groups
  2. *p < 0.05, **p < 0.01
  3. Abbreviation: DMFT decayed, missing, and filled teeth; CPITN community periodontal index of treatment needs; LA loss of attachment