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Table 2 Study characteristics of included ITS

From: Methodology and reporting characteristics of studies using interrupted time series design in healthcare

 

N = 116

Study definition provided in at least title, abstract or main paper

74 (64)

 Title, abstract, and main paper

9 (12)

 Abstract and main paper

16 (22)

 Title and main paper

17 (23)

 Title and abstract

1 (1)

 Title

5 (7)

 Abstract

7 (9)

 Main paper

19 (26)

Country of study

 USA

39 (34)

 UK

18 (16)

 Asia

18 (16)

 Europe

14 (12)

 Canada

11 (9)

 Australia

7 (6)

 Africa

6 (5)

 Middle East

2 (2)

 Panama

1 (1)

Type of intervention

 Programs (e.g. multifaceted)

41 (35)

 Policy (e.g. regulatory)

32 (28)

 Health systems

25 (22)

 Guidelines

19 (16)

 Financial

19 (16)

 Behavioural

15 (13)

 Sales and dispensing

1 (1)

Level of intervention

 Hospital

73 (63)

 Hospital department

22 (19)

 Individual

17 (15)

 GP practices

3 (3)

 Pharmacy

1 (1)

Participants

 Health professional

92 (79)

 Disease

30 (26)

 Occupational

3 (3)

 Population

1 (1)

Data source

 Hospital data

64 (55)

 Health records

27 (23)

 National data

26 (22)

 Insurance data

11 (9)

 Other

3 (3)

Type of outcome

 Continuous

66 (57)

 Rate

38 (33)

 Binary

11 (9)

 Count

1 (1)

Frequency

 Monthly

74 (64)

 Quarterly

23 (20)

 Yearly

14 (12)

 Weekly

2 (2)

 Othera

3 (3)

Number of data points - median (25th,75th centile)

 Pre-intervention

18 (12–32)

 Post-intervention

19 (12–34)

 Ratio of pre/ post-intervention data points

1 (1–2)

 Transition period (n = 20)

3 (1–9)

 Other data points that were accounted for (n = 3)

2 (2–8)

  1. Values are n (%) unless otherwise stated. a 90 day periods; five times over two weeks before and after; daily
  2. Abbreviations: US United States, UK United Kingdom