4. Interventions aimed at restructuring referral processes: reanalysed ITS studies.
| Study | Outcome | Postintervention period | Secular trend (SE, P) | Change in level (SE, P) | Change in slope (SE, P) |
| Direct/open access and direct booking systems | |||||
| Lukman 2004 | Proportion of participants waiting less than recommended time threshold (percentage of participants with moderate/severe lesions waiting less than 4 weeks) every 3 months | 24 months | +0.86% (SE 3.78 P value 0.83) | ‐14.26% (SE 19.83, P value 0.50) | +6.29% (SE 12.26, P value 0.62) |
| Mallard 2004 | Waiting time (days) per month | 12 months | +1.40 (SE 0.8, P value 0.13) | ‐25.20 (SE 3.83, P value < 0.001) | ‐3.03 (SE 0.92, P value 0.005) |
| Distant consultancy | |||||
| Hofstetter 2010 | Waiting time (months) per year | 6 years | ‐0.04 (SE 0.06, P value 0.51) |
‐0.69 (SE 0.55, P value 0.23) | ‐0.21 (SE 0.13, P value 0.15) |
| Single generic waiting list | |||||
| Leach 2004 | Number of participants waiting less than recommended time threshold (less than 9 months) per month |
14 months | +9.44 (SE 10.93, P value 0.40) | ‐20.59 (SE 22.67, P value 0.37) | +2.75 (SE 12.69, P value 0.86) |
| Number of participants waiting within a recommended time threshold (between 9 and 18 months) per month |
‐3.30 (SE 7.78, P value 0.68) | ‐5.28 (SE 16.20, P value 0.75) | ‐6.59 (SE 8.73, P value 0.46) | ||