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Table 5 Odds ratios of dichotomized D, M, and F ratios, 95% confidence intervals (CI) and level of significance for the whole dentition, and for the anterior, premolar and molar regions separately

From: Oral health status of adults in Southern Vietnam - a cross-sectional epidemiological study

   D    M    F  
  OR 95% CI P OR 95% CI P OR 95% CI P
All regions          
Age (per year) 0.996 0.990-1.001   1.008 1.002 - 1.014 ** 0.985 0.997 - 0.993 ***
Femalea 1.37 1.15 - 1.63 *** 0.60 0.50 - 0.72 *** 1.87 1.49 - 2.35 ***
Urbanb 0.71 0.60 - 0.85 *** 0.97 0.80 - 1.18   4.18 3.28 - 5.34 ***
Angiangc 0.98 0.80 - 1.19   1.30 1.04 - 1.62 * 0.41 0.31 - 0.55 ***
HCMc 0.99 0.80 - 1.23   1.13 0.89 - 1.44   0.88 0.68 - 1.13  
SES highd 0.89 0.71 - 1.10   0.84 0.65 - 1.08   1.74 1.36 - 2.21 ***
SES lowd 0.80 0.64 - 1.00   1.39 1.10 - 1.75 ** 0.34 0.22 - 0.53 ***
Anterior region          
Age (per year) 0.988 0.981 - 0.995 *** 1.024 1.016 - 1.031 *** 0.947 0.933 - 0.962  
Femalea 1.20 0.97 - 1.48   0.67 0.54 - 0.83 *** 3.13 2.00 - 4.88 ***
Urbanb 0.70 0.57 - 0.87 *** 1.10 0.88 - 1.38   3.78 2.45 - 5.84 ***
Angiangc 1.11 0.86 - 1.42   1.10 0.85 - 1.42   0.39 0.23 - 0.67 ***
HCMc 0.74 0.57 - 0.97 * 1.45 1.11 - 1.90 ** 0.94 0.60 - 1.46  
SES highd 0.77 0.59 - 1.00   1.13 0.85 - 1.50   1.84 1.20 - 2.82 **
SES lowd 0.78 0.60 - 1.02   1.36 1.04 - 1.78 * 0.63 0.33 - 1.21  
Premolar region          
Age (per year) 0.984 0.977 - 0.992 *** 1.024 1.016 - 1.031 *** 0.966 0.951 - 0.981 ***
Femalea 1.52 1.24 - 1.87 *** 0.58 0.47 - 0.72 *** 2.08 1.37 - 3.16 ***
Urbanb 0.75 0.61 - 0.93 ** 1.05 0.85 - 1.30   4.48 2.77 - 7.25 ***
Angiangc 1.10 0.86 - 1.41   1.12 0.87 - 1.44   0.38 0.22 - 0.66 ***
HCMc 0.90 0.70 - 1.16   1.32 1.01 - 1.72 * 0.65 0.41 - 1.03  
SES highd 1.00 0.77 - 1.30   0.84 0.64 - 1.11   1.54 1.01 - 2.35 *
SES lowd 1.02 0.78 - 1.33   1.09 0.83 - 1.43   0.22 0.08 - 0.62 **
Molar region          
Age (per year) 0.979 0.974 - 0.984 *** 1.025 1.019 - 1.031 *** 0.987 0.979 - 0.996 **
Femalea 1.21 1.04 - 1.42 * 0.69 0.59 - 0.82 *** 1.69 1.32 - 2.17 ***
Urbanb 0.66 0.56 - 0.78 *** 1.05 0.88 - 1.24   4.01 3.04 - 5.28 ***
Angiangc 1.08 0.89 - 1.30   1.14 0.94 - 1.39   0.42 0.30 - 0.59 ***
HCMc 1.05 0.86 - 1.28   1.07 0.87 - 1.32   0.88 0.67 - 1.16  
SES highd 0.91 0.74 - 1.11   0.92 0.74 - 1.14   1.66 1.28 - 2.17 ***
SES lowd 0.91 0.74 - 1.12   1.28 1.03 - 1.58 * 0.24 0.14 - 0.43 ***
  1. * = P ≤ 0.05; ** = P ≤ 0.01; *** = P ≤ 0.001
  2. References (OR = 1) respectively: a male, b rural, c Cantho province, d SES middle
  3. Meaning of OR for example for the Mratio for the molar region: every year older gives a 2.5% higher chance for missing all non-sound molar teeth. The chance for females compared to males on this event is 31% lower, whereas subject with low SES are estimated to have a 28% higher chance compared to middle SES. Other independent variables showed no statistical significant effects.