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Table 3 Association of characteristics of patients and their dental clinics with time for oral health instruction

From: A multilevel analysis of the importance of oral health instructions for preventing tooth loss: The 8020 Promotion Foundation Study of Japanese Dental Patients

  Amount of time for oral health instruction (min)a p value
0 1–9 10–19 ≥ 20
Patient-level variables b
 Smoking
  Never 245 (14.1) 591 (34.0) 567 (32.6) 334 (19.2) 0.536
  Past 74 (13.4) 179 (32.4) 189 (34.2) 111 (20.1)  
  Current 36 (18.2) 56 (28.3) 69 (34.8) 37 (18.7)  
 Tooth brushing frequency (times per day)
  ≥ 3 121 (13.6) 296 (33.2) 296 (33.2) 179 (20.1) 0.091
  2 175 (13.5) 432 (33.3) 430 (33.2) 259 (20.0)  
  ≤ 1 59 (19.7) 98 (32.7) 99 (33.0) 44 (14.7)  
 Eating between meals
  No 50 (15.5) 109 (33.7) 101 (31.3) 63 (19.5) 0.960
  Sometimes 196 (14.4) 453 (33.3) 447 (32.9) 264 (19.4)  
  Everyday 109 (13.5) 264 (32.8) 277 (34.4) 155 (19.3)  
 Use of secondary oral hygiene productsc
  Yes 215 (11.6) 634 (34.1) 630 (33.9) 379 (20.4)  < 0.001
  No 140 (22.2) 192 (30.5) 195 (31.0) 103 (16.3)  
 Bleeding of tooth brushing
  No 220 (14.0) 528 (33.5) 531 (33.7) 298 (18.9) 0.740
  Yes 135 (14.8) 298 (32.7) 294 (32.3) 184 (20.2)  
 Reason for dental visit
  Treatment 174 (20.8) 268 (32.1) 257 (30.7) 137 (16.4)  < 0.001
  Both treatment and maintenance 60 (13.2) 144 (31.6) 165 (36.2) 87 (19.1)  
  Maintenance 121 (10.1) 414 (34.6) 403 (33.7) 258 (21.6)  
Clinic-level variablesd
 Age of dental clinic director
  30s or 40s 34 (15.7) 66 (30.4) 80 (36.9) 37 (17.1) 0.930
  50s 46 (16.7) 92 (33.3) 87 (31.5) 51 (18.5)  
  60s or over 15 (16.3) 32 (34.8) 29 (31.5) 16 (17.4)  
 Gender of dental clinic director
  Male 93 (16.7) 180 (32.3) 189 (33.9) 96 (17.2) 0.234
  Female 2 (7.4) 10 (37.0) 7 (25.9) 8 (29.6)  
 Number of dental hygienists
  0 31 (26.3) 46 (39.0) 25 (21.2) 16 (13.6) 0.001
  1–3 57 (14.8) 119 (30.9) 135 (35.1) 74 (19.2)  
  ≥ 4 7 (8.5) 25 (30.5) 36 (43.9) 14 (17.1)  
  1. aThis is based on a clinic-level variable
  2. bNumber of patients (n = 2488)
  3. cDental floss or interdental brush
  4. dNumber of dental clinics (n = 585)