Table 2 Incidence rate and trends in yearly clinical quality indicator performance.

From: Using data linkage for national surveillance of clinical quality indicators for dementia care among Australian aged care users

 

2011/12

2012/13

2013/14

2014/15

2015/16

Absolute change a

aIRR (95%CI) b

p c

Yearly denominator (n)

153,575

158,041

161,306

163,948

159,378

   

Person-days (n)

43,178,253

44,459,569

45,634,657

46,272,751

46,510,686

   

Antipsychotic medicine dispensing (n)

50,315

50,691

51,423

51,572

49,920

   

  Cumulative incidence (95% CI)

32.8 (32.5–33.0)

32.1 (31.8–32.3)

31.9 (31.7–32.1)

31.5 (31.2–31.7)

31.3 (31.1–31.6)

− 1.5

  

  Incidence per 1000p/d (95% CI)

1.17 (1.16–1.18)

1.14 (1.13–1.15)

1.13 (1.12–1.14)

1.11 (1.10–1.12)

1.07 (1.06–1.08)

− 0.10

0.98 (0.98–0.99)

 < 0.001

Cholinesterase inhibitor and memantine dispensing (n)

26,926

28,102

29,637

31,281

30,376

   

  Cumulative incidence (95% CI)

17.5 (17.3–17.7)

17.8 (17.6–18.0)

18.4 (18.2–18.6)

19.1 (18.9–19.3)

19.1 (18.9–19.3)

1.6

  

  Incidence per 1000p/d (95% CI)

0.62 (0.62–0.63)

0.63 (0.62–0.64)

0.65 (0.64–0.66)

0.68 (0.67–0.68)

0.65 (0.65–0.66)

0.03

1.02 (1.00–1.04) d

0.05

High sedative load (n)

60,096

63,315

65,741

66,743

67,074

   

  Cumulative incidence (95% CI)

39.1 (38.9–39.4)

40.1 (39.8–40.3)

40.8 (40.5–41.0)

40.7 (40.5–41.0)

42.1 (41.8–42.3)

3.0

  

  Incidence per 1000p/d (95% CI)

1.39 (1.38–1.40)

1.42 (1.41–1.44)

1.44 (1.43–1.45)

1.44 (1.43–1.45)

1.44 (1.43–1.45)

0.05

1.01 (1.00–1.01)

 < 0.001

Dementia or delirium-related hospitalisation (n) e

4873

5103

5428

5691

5578

   

  Denominator

105,117

107,638

109,758

111,179

107,804

   

  Person-days (n)

29,541,548

30,287,420

31,014,578

31,323,189

31,340,451

   

  Cumulative incidence (95% CI)

4.6 (4.5–4.8)

4.7 (4.6–4.9)

4.9 (4.8–5.1)

5.1 (5.0–5.3)

5.1 (5.0–5.3)

0.5

  

  Incidence per 1000p/d (95%CI)

0.17 (0.16–0.17)

0.17 (0.16–0.17)

0.18 (0.17–0.18)

0.18 (0.18–0.19)

0.18 (0.17–0.18)

0.01

1.02 (1.01–1.03)

0.001

  1. aIRR Adjusted incidence rate ratio, CI Confidence interval; p/d Person-days.
  2. aFrom 2011/2012 to 2015/2016—crude difference only.
  3. bAnnual change adjusted for age (at beginning of each year) and sex.
  4. cBonferroni correction applied.
  5. dAdjusted for age (at beginning of each year), sex, and time since cohort entry.
  6. eNew South Wales, Victoria, and South Australia only.
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