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Table 4 Modelleda estimates of annual antibiotic use (and 99% CIs) across 68 RAC homes, 2015–2017

From: Trends, determinants and differences in antibiotic use in 68 residential aged care homes in Australia, 2014–2017: a longitudinal analysis of electronic health record data

  2015
(n = 6528)
2016
(n = 6579)
2017
(n = 5908)
All antibiotics
 Days of therapy/1000 resident days 81.57 (75.38, 87.75) 83.30 (77.95, 88.64) 85.06 (78.56, 91.57)
 Number of courses/1000 resident days 7.60 (7.19, 8.01) 7.81 (7.49, 8.12) 8.01 (7.57, 8.46)
 Percent of residents with at least one course of antibiotics 68.39 (66.93, 69.85) 65.94 (64.90, 67.00) 63.44 (61.87, 65.01)
WHO Watch List antibiotics
 Days of therapy/1000 resident days 8.78 (7.61, 9.92) 8.23 (7.46, 9.00) 7.73 (6.69, 8.77)
 Number of courses/1000 resident days 1.07 (0.94, 1.20) 0.99 (0.90, 1.08) 0.92 (0.80, 1.03)
 Percent of residents with at least one course of antibiotics 17.02 (15.85, 18.19) 15.17 (14.39, 15.95) 13.46 (12.38, 14.55)
  1. CI is confidence interval.
  2. aModelled using generalised estimating equations with fixed effects for RAC home, resident presence in winter months (May to September). Models are adjusted for resident demographics and comorbidities