Caseload and summary demographics
| Centre | Year | Total | Male, n (%) | Female, n (%) | Mean age (years) | Age range (years) | Diff mean age, t-value | Diff mean age, P value | Sex, χ² | P value |
| Oxford | 2020 | 53 | 39 (75) | 14 (26) | 60 | 20–89 | ||||
| 2018 | 74 | 52 (70) | 22 (30) | 68 | 19–92 | 3.003 | 0.003 | 0.03 | 0.868 | |
| Imperial | 2020 | 19 | 11 (58) | 8 (42) | 60 | 21–89 | ||||
| 2018 | 22 | 10 (45) | 12 (55) | 60 | 22–91 | 0.132 | 0.895 | 0.63 | 0.427 | |
| Newcastle | 2020 | 203 | 134 (66) | 69 (34) | 69 | 17–97 | ||||
| 2018 | 89 | 64 (72) | 25 (28) | 70 | 31–92 | −0.614 | 0.539 | 0.99 | 0.321 | |
| Sheffield | 2020 | 109 | 80 (73) | 29 (27) | 68 | 19–102 | ||||
| 2018 | 124 | 76 (61) | 48 (39) | 67 | 14–100 | −0.253 | 0.8 | 3.84 | 0.069 | |
| Guy’s and St Thomas’ (GSST) | 2020 | 54 | 38 (74) | 16 (26) | 61 | 20–93 | ||||
| 2018 | 39 | 23 (59) | 16 (41) | 65 | 23–93 | 1.096 | 0.276 | 1.30 | 0.254 | |
| Leicester city, Rutland, N & S Leicestershire | 2020 | 73 | 48 (66) | 25 (34) | 68 | 25–95 | ||||
| 2018 | 77 | 51 (66) | 26 (34) | 68 | 25–98 | 0.093 | 0.926 | 0.01 | 0.912 | |
| Buckinghamshire | 2020 | 91 | 60 (66) | 31 (34) | 68 | 21–102 | ||||
| 2018 | 73 | 48 (66) | 25 (34) | 72 | 18–99 | 1.036 | 0.302 | 0.02 | 0.887 | |
| Total | 2020 | 602 | 410 (68) | 192 (32) | 67 | 17–102 | ||||
| 2018 | 498 | 324 (65) | 174 (35) | 68 | 14–100 | −0.868 | 0.386 | 1.00 | 0.316 |