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Table 1 Descriptive characteristics of the study population in CPRD

From: Potentially inappropriate prescribing among older people in the United Kingdom

  PIP (n = 723,838) No PIP (n = 295,653)
Gender   
  -Male (%) 122,817 (28.7) 304,622 (71.3)
  -Female (%) 172,834 (29.2) 419,211 (70.8)
  -Missing (%) 2  
Age (years)   
  -7074 (%) 82,177 (37.4) 137,366 (62.6)
  -7580 (%) 92,488 (37.6) 153,778 (62.4)
  -8185 (%) 62,407 (33.1) 126,040 (66.9)
  - > 85 (%) 58,581 (18) 306,654 (84)
Morbidities (Charlson morbidity index score)   
  -1 (%) 189,864 (28.3) 481,983 (71.7)
  -2 (%) 52,365 (46.8) 59,519 (53.2)
  -3 (%) 53,424 (22.7) 182,336 (77.3)
Polypharmacy (≥4 medications)   
  -Never (%) 114,816 (14.6) 669,572 (85.3)
  -Ever (%) 180,837 (76.9) 54,266 (23.1)
Chronic Obructive Pulmonary Disease   
  -No (%) 277,497 (28.2) 707,447 (71.8)
  -Yes (%) 18,156 (52.6) 16,391 (47.5)
Peptic ulcer   
  -No (%) 274,487 (28.9) 675,938 (71.1)
  -Yes (%) 21,166 (30.7) 47,900 (69.4)
Diabetes   
  -No (%) 225,280 (27.3) 625,591 (72.7)
  -Yes (%) 70,373 (41.7) 98,247 (58.3)
Dementia   
  -No (%) 283,983 (28.5) 710,985 (71.5)
  -Yes (%) 11,670 (47.6) 12,853 (52.4)
Hypertension   
  -No (%) 140,467 (21.1) 525,316 (78.9)
  -Yes (%) 155,186 (43.9) 198,522 (56.1)
Osteoarthritis   
  -No (%) 216,981 (26.5) 601,325 (73.5)
  -Yes (%) 78,672 (39.1) 122,513 (60.9)
Heart failure   
  -No (%) 292,294 (29.0) 715,868 (71.0)
  -Yes (%) 3,359 (29.7) 7,970 (70.4)
Parkinsonism   
  -No (%) 290,071 (29.0) 709,721 (71.0)
  -Yes (%) 5,582 (28.3) 14,117 (71.7)