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Table 3 Erosion and variables studied

From: Dental caries and erosion status of 12-year-old Hong Kong children

Variable (N) BEWE (±SD) p-value
Children examined (600) 1.7 ± 1.6  
Gender (600)   
   Girls (284) 1.8 ± 1.8 0.166
   Boys (316) 1.6 ± 1.4  
Place of birth (577)   
   Hong Kong (491) 1.7 ± 1.6 0.438
   Not in Hong Kong (86) 1.8 ± 1.7  
Frequency of soft drinks (600)   
   At least once every two days (120) 1.9 ± 2.1 0.110
   Less than once every two days (480) 1.6 ± 1.4  
Frequency of citric tea / drinks containing lemon (600)   
   At least once every two days (113) 1.8 ± 1.7 0.194
   Less than once every two days (487) 1.6 ± 1.5  
Frequency of fruit juice (600)   
   At least once every two days (115) 2.0 ± 1.7 0.015
   Less than once every two days (485) 1.6 ± 1.5  
Frequency of chewing gum (600)   
   At least once every two days (70) 2.0 ± 2.1 0.046
   Less than once every two days (530) 1.6 ± 1.5  
Frequency of Vitamin C supplement drinks (600)   
   At least once every two days (82) 2.0 ± 2.0 0.064
   Less than once every two days (518) 1.6 ± 1.4  
Frequency of toothbrushing (600)   
   At least once a day (144) 2.0 ± 1.9 0.017
   Twice or more (456) 1.6 ± 1.5  
Care taker (598)   
   Parents (501) 1.6 ± 1.6 0.233
   Others (97) 1.8 ± 1.6  
Education of father (573)   
   Primary or below (61) 1.9 ± 1.8 0.574
   Secondary (395) 1.6 ± 1.7  
   Tertiary or above (117) 1.7 ± 1.2  
Education of mother (585)   
   Primary or below (64) 1.8 ± 1.7 0.614
   Secondary (434) 1.7 ± 1.6  
   Tertiary or above (87) 1.2 ± 1.1  
Parent’ dental knowledge (600)   
   Low (53) 1.7 ± 1.5 0.665
   Middle (534) 1.7 ± 1.6  
   High (13) 1.3 ± 2.0  
Caries experience (600)   
   No (476) 1.5 ± 1.4 0.004
   Yes (124) 2.1 ± 2.1