Table 4 Results from the interrupted item series analysis. p < 0.001 unless stated. When the interaction term was insignificant, results from the main effects model are presented (i.e. NHS Borders, NHS Fife, NHS Forth Valley and NHS Grampian)
Step change in percentage of zero day admissions relative to all admissions after SSPAU opened | Percentage change in zero day admissions per month between Jan 2000 and Dec 2013 | Change in zero day admission after SSPAU open (Interaction term) (p-value) | |
|---|---|---|---|
All centres combined | + 13 [10, 15] | + 0.12 [0.11, 0.14] | p < 0.001 |
NHS Ayrshire and Arran | + 71 [57, 86] | + 0.18 [0.11, 0.26] | p < 0.001 |
NHS Borders | + 14 [2, 27] | + 0.53 [0.42, 0.64] | p = 0.398 |
NHS Dumfries and Galloway | −2 [−12, + 8] | + 0.54 [0.44, 0.64] | p = 0.029 |
NHS Fife | −42 [−49, −36] | −0.29 [−0.37, −0.20] | p = 0.400 |
NHS Forth Valley | − 23 [− 27, 19] | + 0.31 [0.27, 0.35] | p = 0.123 |
NHS Grampian | + 24 [15, 32] | + 0.63 [0.57, 0.69] | p = 0.325 |
NHS Lanarkshire | + 6 [−1, + 15] | + 0.15 [0.08, 0.22] | p < 0.001 |