Table 2.
Unweighted centre level mean number of visits to the emergency department or admissions to hospital per patient by size of centre during the at-risk period*
| Size of centre | Intervention | Control | Mean difference (95% CI) between intervention and control | |||
|---|---|---|---|---|---|---|
| No of patients (centres) | Mean (SD) | No of patients (centres) | Mean (SD) | |||
| Large | 532 (5) | 0.90 (0.07) | 778 (5) | 0.74 (0.17) | 0.17 (−0.05 to 0.38) | |
| Medium | 302 (3) | 0.92 (0.23) | 216 (2) | 0.97 (0.16) | −0.04 (−0.60 to 0.51) | |
| Small | 110 (2) | 0.92 (0.76) | 220 (3) | 1.25 (0.63) | −0.33 (−3.25 to 2.58) | |
| Overall | 944 (10) | 0.91 (0.28) | 1214 (10) | 0.94 (0.40) | −0.024 (−0.24 to 0.15)† | |
SD=standard deviation.
*
From the start of chemotherapy to the end plus 30 days.
†
Cluster level overall group comparison P=0.85 based on permutation test (when adjusted for size of centre P=0.94); confidence intervals calculated by bootstrapping.