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Table 1 Baseline characteristics of the risk and control groups in adults (age < 65)

From: Oral health in adults with coronary artery disease and its risk factors: a comparative study using the Korea National Health and Nutrition Examination Survey data

Variables Categories Unadjusted data Propensity-matched data
Control (n = 5639), M ± SD, n (%) At risk (n = 2014), M ± SD, n (%) p Control (n = 1661), M ± SD, n (%) At risk (n = 1661), M ± SD, n (%) p
Age (years)   45.41 ± 0.19 54.60 ± 0.20 < .001 53.78 ± 0.22 53.42 ± 0.22 .205
Sex Male 2273 (38.0) 990 (46.4) < .001 818 (46.4) 784 (43.7) .165
  Female 3366 (62.0) 1024 (53.6)   843 (53.6) 877 (56.3)  
Education ≤ Middle school 689 (12.3) 692 (34.9) < .001 467 (28.0) 507 (31.4) .095
  ≥ High school 4950 (87.7) 1322 (65.1)   1194 (72.0) 1154 (68.6)  
Household income Middle-low 1680 (29.4) 786 (37.9) < .001 599 (35.4) 602 (35.6) .902
  Middle-high 3959 (70.6) 1228 (62.1)   1062 (64.6) 1059 (64.4)  
Marital status Married 5040 (89.5) 1913 (95.8) < .001 78 (95.8) 1569 (95.5) .687
  Single/others 599 (10.5) 101 (4.2)   572 (4.2) 92 (4.5)  
Family history of CVD No 2307 (41.8) 613 (29.9) < .001 1583 (35.0) 548 (32.3) .175
  Yes 3332 (58.2) 1401 (70.1)   1089 (65.0) 1113 (67.7)  
Living area Urban 4846 (86.7) 1615 (82.4) .002 291 (15.9) 297 (16.1) .887
  Rural 793 (13.3) 399 (17.6)   1370 (84.1) 1364 (83.9)  
Employment None/housewife 1490 (28.1) 585 (30.2) .154 447 (29.3) 490 (30.9) .412
  Employed 4149 (71.9) 1429 (69.8)   1214 (70.7) 1171 (69.1)  
Smoking Never/ex-smoker 4518 (80.9) 1566 (79.5) .281 1282 (78.4) 1272 (78.8) .819
  Current smoker 1121 (19.1) 448 (20.5)   379 (21.6) 389 (21.2)  
BMI < 25 kg/m2 3932 (71.1) 1050 (53.6) < .001 976 (59.5) 940 (58.0) .435
  ≥ 25 kg/m2 1707 (28.9) 964 (46.4)   685 (40.5) 721 (42.0)  
  1. CVD cardiovascular disease, BMI body mass index