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Table 3 The effect of STAT on secondary outcomes

From: Sustainable waiting time reductions after introducing the STAT model for access and triage: 12-month follow up of a stepped wedge cluster randomised controlled trial

  Original trial 12-month follow up Sensitivity analysis
Pre-intervention Post intervention 0 to 12 month post intervention 9 to 12 month post intervention
n 1252 1861 3016 821
Appointments missed per patient, n
Mean (SD) 0.4 (0.9) 0.5 (0.7) 0.3 (0.7) 0.3 (0.7)
Adj Ratio (95% CI) Reference IRR: 1.18 (1.04 to 1.35) IRR: 0.86 (0.69 to 1.07) IRR: 0.78 (0.63 to 0.97)
Time from 1st to 2nd appointment, days, n
Mean (SD) 28.8 (20.0) 28.5 (18.5) 29.8 (20.5) 28.3 (19.0)
Adj Ratio (95% CI) Reference IRR: 1.03 (0.98 to 1.09) IRR: 1.06 (0.94 to 1.19) IRR: 1.04 (0.96 to 1.14)
Appointments in first 12 weeks, n
Mean (SD) 2.4 (2.1) 2.1 (1.6) 2.1 (1.6) 2.0 (1.6)
Adj Ratio (95% CI) Reference IRR 0.99 (0.93 to 1.05) IRR: 0.94 (0.89 to 0.98) IRR: 0.89 (0.73 to 1.10)
  1. Adj ratio Adjusted ratio indicates that other factors, such as potential confounders, have been included in the model
  2. IRR calculated using generalised linear mixed effects models