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Table 3 Comparison of oral health between the risk and control groups before and after propensity score matching in adults (age < 65 years)

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 Unadjusted data Propensity-matched data
Control (n = 5639), n (%) At risk (n = 2014), n (%) p Control (n = 1661), n (%) At risk (n = 1661), n (%) p
Chewing problem
 No 4802 (85.3) 1492 (75.5) < .001 1289 (77.7) 1246 (76.4) .496
 Yes 837 (14.7) 522 (24.5)   372 (22.3) 415 (23.6)  
Speaking problem
 No 5442 (96.5) 1848 (92.4) < .001 1548 (93.4) 1534 (93.1) .775
 Yes 197 (3.5) 166 (7.6)   113 (6.6) 127 (6.9)  
Use of oral hygiene supplies
 No 2044 (36.0) 916 (44.4) < .001 708 (41.5) 741 (43.7) .285
 Yes 3595 (64.0) 1098 (55.6)   953 (58.5) 920 (56.3)  
Oral examination in the last 1 year
 No 3334 (58.9) 1200 (59.5) .688 984 (59.9) 979 (58.9) .638
 Yes 2305 (41.1) 814 (40.5)   677 (40.1) 682 (41.1)  
Tooth brushing per day
 < 3 times 2273 (39.8) 1004 (48.8) < .001 788 (45.5) 808 (47.6) .311
 ≥ 3 times 3366 (60.2) 1010 (51.2)   873 (54.5) 853 (52.4)  
Preventive dental treatmenta
 No 3658 (64.2) 1244 (61.2) .048 1072 (63.8) 1031 (61.5) .251
 Yes 1981 (35.8) 770 (38.8)   589 (36.2) 630 (38.5)  
Dental hospital use
 No 2425 (42.9) 773 (38.2) .002 664 (40.7) 646 (38.8) .337
 Yes 3214 (57.1) 1241 (61.8)   997 (59.3) 1015 (61.2)  
Simple dental treatmenta
 No 4679 (83.2) 1671 (83.0) .871 1389 (84.1) 1379 (83.0) .462
 Yes 960 (16.8) 343 (17.0)   272 (15.9) 282 (17.0)  
Dental nerve treatmenta
 No 4951 (88.1) 1676 (82.9) < .001 1395 (84.8) 1387 (83.5) .373
 Yes 688 (11.9) 338 (17.1)   266 (15.2) 274 (16.5)  
Gingival disease treatmenta
 No 4935 (87.8) 1619 (80.9) < .001 1366 (82.8) 1328 (80.8) .181
 Yes 704 (12.2) 395 (19.1)   295 (17.2) 333 (19.2)  
Tooth extraction or oral surgerya
 No 5216 (92.8) 1796 (89.0) < .001 1495 (90.2) 1479 (89.1) .405
 Yes 423 (7.2) 218 (11.0)   166 (9.8) 182 (10.9)  
Number of remaining teeth
 < 20 364 (6.6) 328 (15.4) < .001 230 (13.8) 240 (13.2) .658
 ≥ 20 5275 (93.4) 1686 (84.6)   1431 (86.2) 1421 (86.8)  
Permanent dental caries patients
 No 3989 (72.0) 1454 (73.1) .425 1201 (74.6) 1199 (73.2) .427
 Yes 1650 (28.0) 560 (26.9)   460 (25.4) 462 (26.8)  
Prevalence of periodontal disease
 No 4178 (74.9) 1153 (58.1) < .001 1033 (63.8) 965 (59.0) .017
 Yes 1461 (25.1) 861 (41.9)   628 (36.2) 696 (41.0)  
  1. aResponses were based on experience within the previous year