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Table 1 Characteristics of the 8620 study participants

From: Patterns of dementia treatment in older adults with Parkinson’s disease using nationwide medical claims data

  All (n = 8620)   
Characteristic PD without D (n = 4741) PD with D (n = 3879) P SMD
Sex, female 2760 (58.2) 2505 (64.6) < 0.001 0.1316
Age at the first claim with PD diagnosis (years) 74.6 ± 5.9 74 ± 6.0 < 0.001 0.1009
 60–64 145 (3.1) 174 (4.5)   
 65–69 781 (16.5) 756 (19.5)   
 70–74 1556 (32.8) 1216 (31.4)   
 75–79 1319 (27.8) 1033 (26.6)   
 80–84 660 (13.9) 517 (13.3)   
 85 or more 280 (5.9) 183 (4.7)   
Residential area    < 0.001  
 Seoul and capital areaa 2003 (42.3) 1401 (36.1)   0.1271
 Metropolitan cityb 830 (17.5) 700 (18.1)   0.0157
 Rural area 1908 (40.2) 1778 (45.8)   0.1132
Income quintiles    < 0.001  
 Medicaid 549 (11.6) 597 (15.4)   0.1115
 Q1(lowest) 589 (12.4) 458 (11.8)   
 Q2 421 (8.9) 336 (8.7)   
 Q3 521 (11) 416 (10.7)   
 Q4 849 (17.9) 628 (16.2)   
 Q5(highest) 1812 (38.2) 1444 (37.2)   
Anticholinergic use 1138 (24.0) 1459 (37.6) < 0.001 0.2962
 Trihexyphenyl 711 (15.0) 910 (23.5) < 0.001 0.2168
 Benztropine 524 (11.1) 778 (20.1) < 0.001 0.2505
Anti-dementia medication use 15 (0.3) 2539 (65.5) < 0.001 1.7764
  1. Abbreviations: PD Parkinson’s disease, D dementia, SMD standardized mean difference
  2. Data are shown as mean ± SD or number (%). P values were obtained by t-test for continuous variables or chi-square test for categorical variables
  3. aSeoul, Incheon, and Gyeonggi-do; bBusan, Daegu, Daejeon, Gwangju, Sejong, and Ulsan