Risk of bias for ITS studies
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
|---|---|---|---|---|---|---|---|
| Lopez-Picazo Ferrer et al 28 | UC | L | L | L | UC | L | H |
| Stenner et al27 | L | L | L | L | UC | L | – |
Key: (1) intervention independent of other changes; (2) shape of intervention effect; (3) intervention unlikely to affect data collection; (4) knowledge of allocated intervention adequately prevented; (5) incomplete outcome data; (6) selective outcome reporting and (7) other risk of bias.
H, high; L, low; ITS, interrupted time-series; UC, unclear.