Study level characteristics | All ITS studies (n = 200) | ITS studies with available data (n = 166) | ||
---|---|---|---|---|
n | % | n | % | |
Type of interruption | ||||
Exposurea | 12 | 6 | 10 | 6 |
Intervention | 188 | 94 | 156 | 94 |
Intervention type | ||||
Policy change | 104 | 52 | 82 | 49 |
Practice change | 40 | 20 | 36 | 22 |
Communication | 29 | 15 | 24 | 14 |
Organisation of care | 13 | 7 | 12 | 7 |
Clinical intervention | 2 | 1 | 2 | 1 |
Time interval type | ||||
Daily | 3 | 2 | 2 | 1 |
Weekly | 9 | 5 | 6 | 4 |
Two weekly | 1 | 1 | 1 | 1 |
Monthly | 120 | 60 | 96 | 58 |
Quarterly | 31 | 16 | 28 | 17 |
Six monthly | 3 | 2 | 3 | 2 |
Annually | 20 | 10 | 17 | 10 |
Other | 12 | 6 | 12 | 7 |
Can't determine | 1 | 1 | 1 | 1 |
Series level characteristics | ITS (n = 230) | ITS with available data (n = 190) | ||
median | IQR | median | IQR | |
Number of time points per series | 48 | (30, 100) | 41 | (25, 71) |
Number of time points in the segments used to calculate estimates for the first interruption | 18 | (10, 34) | 16 | (10, 28) |