359 Detectability of medication errors in older people prior to potentially preventable admissions Table 1. Baseline characteristics of the study population. Characteristics n = 72 Age, years 80 (76–86)a Sex, female 36 (50.0)a Number of co-morbidities 14 (9–19) Number of medications 10 (8–14) Renal function, CKD-EPI; ml/min/1.73m2 51 (36–66) Nursing home residents 6 (8.3) Housebound 9 (12.5) Barthel Index for activities of daily livingb 90 (70–100) Patients with one or more fall(s) in the previous year Number of falls in the previous year 35 (48.6) 0 (0–1) Patients with one or more hospital admission in the previous year Number of hospital admissions in the previous year 38 (52.8) 1 (0–2) Length of hospital stay (days) 8 (5–11) Admission type - Elective - Non-elective 13 (18.1) 59 (81.9) Ward - Medical - Surgical 58 (80.6) 14 (19.4) Country of inclusionc - Switzerland - Belgium - Ireland - The Netherlands 36 (50.0) 12 (16.7) 9 (12.5) 15 (20.8) aData are presented as median (interquartile range) for continuous variables or numbers (percentages) for categorical variables. bValues ranged from 0–100. Higher values indicate higher functional independence [43]. cThe distribution of the total enrolled intervention patients in the OPERAM trial (n = 963) differed between the four participating countries; Switzerland: n = 446 (46%), Belgium: n = 150 (16%), Ireland: n = 138 (14%), The Netherlands: n = 229 (24%) [38]. Missing data: renal function: n = 8 (11.1%). Data were collected at the time of the in-hospital medication review at index hospitalisation. CKD-EPI = Chronic kidney disease epidemiology collaboration equation. 4
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