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Table 2 Poisson regression analysis of the factors associated with the increased number of dental decay

From: U-shaped association between untreated caries and body mass index in adults at Rabat dental University hospital, Morocco: cross sectional study

  DT mean ± SD Univariate analysis Mulivariate analysis
PR 95% CI p PR 95% CI p
Age (/year)   1.007 0.99–1.01 0.13 0.98 0.97–1.00 0,05
Gender
 Male 5.4 ± 3.7 1.03 0.86–1.24 0.68    
 Female 5.2 ± 3.4 1      
Income
 Low 7.1 ± 3 1.65 1.30–2.07 <0.001 1.45 1.05–2.02 0.02
 Medium 5.4 ± 3.5 1.25    1.06   0.62
 High 4.3 ± 3.7 1 1.02–1.52 0.02 1 0.83–1.34  
Frequency of tooth brushing
 0 or 1/day 6.8 ± 3. 3 1.54 1.20–1.97 0.001 1.006 0.74–1.35 0.97
 2/day 5.6 ± 3.6 1.34 1.06–1.58 0.009 1.03 0.83–1.28 0.74
 3/day 4.2 ± 3.6 1    1   
Tooth brushing motion
 Appropriate 4.5 ± 3.5 0.65 0.54–0.77 <0.001 0.81 0.98–1.50 0.06
 Inappropriate 7 ± 3.4 1    1   
 Age at beginning tooth brushing   1.16 1.08–1.24 <0.001 1.15 1.05–1.25 0.02
Education level
 Non and primary 6 ± 3.6 1.35 1.09–1.68 0.006 1.14 0.81–1.58 0.43
 Secondary 6.1 ± 3.4 1.49  1.23–1.81 <0.001 1.37  1.09–1.71 0.006
 University 4.4 ± 3.5 1    1   
BMI
 Underweight 6.4 ± 3.9 1.58 1.29–1.94 <0.001 1.66 1.30–2.12 <0.001
 Normal weight 4.4 ± 3.5 1    1   
 Overweight and obese 5.3 ± 3.2 1.28 1.02–1.60 0.02 1.30 1.03–1.65 0.02
SDI 1.1 ± 0.3 0.88 0.79–0.99 0.03 0.61 0.50–0.75 <0.001
CSI* 0.5 (0.16–1.16) 0.94 0.84–1.07 0.40    
GI   1.19 1.06–1.33 0.002 1.59 1.30–1.94 <0.001
Reason of the dental attendance
 Planned visit 4.1 ± 3.3 0.73 0.54–0.90 0.004 0.94 0.74–1.18 0.62
 Acute visit 5.7 ± 3.7 1    1   
  1. * Median (interquartile range)
  2. SD standard deviation, F female, M Male, BMI body mass index, DT number of decayed untreated teeth, GI gingival index, CIS calculus surface index, SDI simplified Debris index, PR prevalence ratio, 1 reference category