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Table 3 Distribution of periodontitis in relation to demographic, socioeconomic and behavioral factors for participants reporting Sami affiliation, n = 1381

From: Periodontal health in an indigenous Sámi population in Northern Norway: a cross-sectional study

  Periodontitis  
NSP
n (%)
Stage II
n (%)
Stage III + IV
n (%)
P value
Total 693 (50.2) 403 (29.2) 285 (20.6)  
Age     <  0.001
 18–34 300 (95.8)a 8 (2.6)a 5 (1.6)a  
 35–49 278 (63.9)b 101 (23.2)b 56 (12.9)b  
 50–64 81 (17.4)c 223 (47.6)c 164 (35.0)c  
 65–75 34 (20.6)c 71 (43.0)c 60 (36.4)c  
Gender     0.011
 Men 271 (46.8)b 167 (28.8) 141 (24.4)b  
 Women 422 (52.6)a 236 (29.4) 144 (18.0)a  
Household income     0.602
  < 300,000 90 (48.8) 63 (34.4) 31 (16.8)  
 300,001-600,000 267 (48.8) 163 (29.8) 117 (21.4)  
 600,001-900,000 205 (51.2) 109 (27.3) 86 (21.5)  
  > 900,000 88 (50.6) 47 (27.0) 39 (22.4)  
Education     <  0.001
 1–9 years 57 (32.0)a 55 (30.9) 66 (37.1)a  
 10–13 years 223 (48.3)b 140 (30.3) 99 (21.4)b  
  > 14 years 391 (57.1)c 192 (28.1) 101 (14.8)c  
Smoking     <  0.001
 Yes 100 (35.3)a 90 (31.8) 93 (32.9)a  
 No 583 (54.0)b 309 (28.7) 187 (17.3)b  
Toothbrushing     0.406
  < 1 time a day 79 (55.6) 32 (22.6) 31 (21.8)  
 1 time a day 235 (50.9) 133 (28.8) 94 (20.3)  
  ≥ 2 times a day 378 (48.8) 237 (30.6) 160 (20.6)  
Frequency of dental visits     <  0.001
 Yearly 325 (44.5)a 222 (30.5) 182 (25.0)a  
 Every other year 292 (58.3)b 134 (26.7) 75 (15.0)b  
 Seldom 70 (51.5)c 44 (32.3) 22 (16.2)b  
  1. NSP; No severe periodontitis, Stage II and stage III/IV classified according to a modified AAP/EFP classification method. *P-value for differences between groups using the χ2 test
  2. Differences between groups were assessed with z-test. Different superscript letters denotes significant differences in periodontitis prevalence between characteristics (column proportions) at the 0.05 level