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Table 2 Distribution of periodontitis in relation to demographic, socioeconomic and behavioral factors for the total sample, n = 2078

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 1046 (50.3) 615 (29.6) 417 (20.1)  
Ethnicity     0.630
 Sámi 693 (50.2) 403 (29.2) 285 (20.6)  
 Non-Sámi 353 (50.6) 212 (30.4) 132 (18.9)  
Age     <  0.001
 18–34 400 (95.5)a 13 (3.1)a 6 (1.4)a  
 35–49 453 (65.9)b 152 (22.1)b 82 (11.9)b  
 50–64 142 (20.0)c 332 (46.8)c 235 (33.1)c  
 65–75 51 (19.4)c 118 (44.9) c 94 (35.7)c  
Gender     0.001
 Men 418 (46.8)a 265 (29.6) 211 (23.6)a  
 Women 628 (53.0)b 350 (29.6) 206 (17.4)b  
Household income     0.884
  < 300,000 133 (48.2) 91 (33.0) 52 (18.8)  
 300,001-600,000 398 (50.3) 231 (29.2) 163 (20.6)  
 600,001-900,000 314 (51.1) 182 (29.6) 119 (19.3)  
  > 900,000 145 (49.8) 83 (28.5) 63 (21.6)  
Education     <  0.001
 1–9 years 74 (30.6)a 77 (31.8)a 91 (37.6)a  
 10–13 years 382 (48.9)b 245 (31.4)a 154 (19.7)b  
  > 14 years 562 (57.0)c 275 (27.9)a 149 (15.1)c  
Smoking     <  0.001
 Yes 159 (35.9)a 145 (32.7) 139 (31.4)a  
 No 875 (54.4)b 461 (28.7) 271 (16.9)b  
Toothbrushing     0.220
  < 1 time a day 99 (56.6) 40 (22.9) 36 (20.6)  
 1 time a day 322 (51.0) 180 (28.5) 129 (20.4)  
  ≥ 2 times a day 623 (49.1) 394 (31.0) 252 (19.9)  
Frequency of dental visits     <  0.001
 Yearly 517 (45.0)a 351 (30.5) 282 (24.5)a  
 Every other year 419 (58.1)b 204 (28.3) 98 (13.6)b  
 Seldom 102 (54.5) b 55 (29.4) 30 (16.0)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