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Table 2 The distribution of responses to self-reported questionnaire items in the study population

From: Prevalence of dental caries and associated factors of detention center inmates in South Korea compared with Korea National Health and Nutrition Examination Survey (KNHANES) respondents: a retrospective study

Variable

Inmate Patients (n = 642)

n(%)

KNHANES (n = 13,345)

n(%)

Total Answer

Missing data

Total Answer

Missing data

Time since last dental visit (month)

Mean/SD

  

27.1 (52.9)

2 (0.0%)

Diabetes

  

Yes

75 (12.1%)

22 (3.4%)

No

545 (87.9%)

Cardiovascular disease

  

Yes

50 (8.1%)

24 (3.7%)

No

568 (91.9%)

Discomfort while chewing

  

Yes

495 (79.8%)

22 (3.4%)

No

90 (14.5%)

Do not know

35 (5.6%)

Previous training on tooth brushing

  

Yes

332 (54.0%)

27 (4.2%)

No

283 (46.0%)

Number of times teeth are brushed in a day

Mean/SD

  
 

3.0 (0.9)

2 (0.0%)

Brushing of teeth before sleep

  

Always

298 (48.1%)

22 (3.4%)

Usually

174 (28.1%)

Sometimes

111 (17.9%)

Rarely

37 (6.0%)

Use of dental floss

  

Always

79 (12.8%)

23 (3.6%)

Usually

87 (14.1%)

Sometimes

171 (27.6%)

Rarely

282 (45.6%)

Bleeding gums

  

Yes

464 (74.8%)

22 (3.4%)

No

137 (22.1%)

Do not know

19 (3.1%)

History of dental pain

Yes

466 (75.2%)

22 (3.4%)

4165 (31.2%)

4 (0.0%)

No

125 (20.2%)

Do not know

29 (4.7%)

9176 (68.8%)

Self-rated oral health

Very good

0 (0%)

22(3.4%)

124 (1.0%)

4 (0.0%)

Good

29 (4.7%)

1153 (8.6%)

Moderate

149 (24.0%)

7100 (53.2%)

Bad

282 (45.5%)

4255 (31.9%)

Very bad

160 (25.8%)

709 (5.3%)

  1. KNHANES Korea National Health and Nutrition Examination Survey, SD standard deviation