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Table 1 Demographics of the study population

From: Old age and other factors associated with salivary microbiome variation

Demographics   Young (18–45) Middle age (46–64) p value Old (65–94) p value
N = 85 N = 101 N = 85
Gender* Female 59 56   49  
  Male 26 45 p < 0.0688 36 p < 0.1513
Tobacco use* Yes 11 21   17  
  No 74 80 p < 0.1765 68 p < 0.3012
Periodontal disease* Yes 21 43   23  
  No 64 58 p < 0.0131 62 p < 0.8611
Dentate* Yes 82 81   46  
  No 3 20 p < 0.0006 39 p < 0.00001
Caries** *** Mean 4.87 ± 0.85 3.82 ± 0.73 p < 0.35 1.3 ± 0.35 p < 0.0001
Age** Mean 33.7 ± 1.3 56.6 ± 5.1 p < 7.47 × 10−54 73.0 ± 6.5 p < 1.006 × 10−82
Medication Count** Average 1.31 ± 2.53 3.46 ± 4.42 p < 2.55 × 10−5 5.08 ± 6.46 p < 2.36 × 10−11
  1. *Fisher exact test versus young
  2. **Student t-test versus young
  3. ***2 subjects in Young and 1 in Middle age group unknown caries level