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Table 1 Distribution of participants in relation to sociodemographic, behavioral and biological individual-level variables stratified by age

From: Co-occurrence of dental caries and periodontitis: multilevel modelling approach

Individual-level variables (level-2)

≤ 44 years n = 356

45–54 years n = 312

55–64 years n = 362

65 + years n = 375

Age, years [mean (SD)]

39.03 (2.92)

49.96 (2.85)

59.44 (2.87)

69.54 (3.01)

Sex [n (%)]

356

311

362

375

 Females

226 (64)

207 (66)

250 (69)

256 (68)

 Males

130 (36)

104 (34)

112 (31)

119 (32)

Education, years [mean (SD)]

16.52 (3.61)

14.39 (2.87)

14.19 (2.56)

13.87 (3.11)

Residency [n (%)]

356

312

362

374

 Urban

289 (81)

208 (67)

234 (65)

274 (73)

 Peri-urban/rural

67 (19)

104 (33)

128 (35)

100 (27)

Sugar-containing diet [n (%)]

299

233

230

204

 Less frequent

148 (49)

93 (40)

92 (40)

74 (36)

 More frequent

151 (51)

140 (60)

138 (60)

130 (64)

Tooth brushing frequency [n (%)]

353

309

356

370

 Twice a day or more

189 (53)

157 (51)

169 (47)

172 (46)

 Once a day or less

164 (47)

152 (49)

187 (53)

198 (54)

Use of interdental care products [n (%)]

352

308

353

368

 Yes

102 (29)

111 (36)

158 (45)

152 (41)

 No

250 (71)

197 (64)

195 (55)

216 (59)

Last dental visit [n (%)]

353

309

356

364

 Within the last year

267 (75)

223 (72)

257 (72)

240 (66)

 More than a year ago

88 (25)

86 (28)

99 (28)

124 (34)

Smoking [n (%)]

352

304

353

346

 Not daily

288 (82)

251 (83)

302 (86)

329 (95)

 Daily

64 (18)

53 (17)

51 (14)

17 (5)

Systemic diseases [n (%)]

341

296

352

346

 No

238 (70)

153 (52)

226 (64)

74 (21)

 Yes

103 (10)

143 (48)

126 (36)

272 (79)

Use of medications [n (%)]

348

302

349

352

 No

286 (82)

183 (61)

139 (40)

77 (22)

 Yes

62 (18)

119 (38)

210 (60)

275 (78)

Xerostomia [n (%)]

356

312

362

375

 Never/seldom

345 (97)

293 (94)

328 (90)

327 (87)

 Often/always

11 (3)

19 (6)

34 (10)

48 (13)