Table 1.
Demographics stratified by the measurement method for distance between tumour margin and tantalum ring (DTR)
| DTR measurement method | |||||
|---|---|---|---|---|---|
| Group 1 | Group 2 | ||||
| Group 2A | Group 2B | ||||
| Feature | Transillumination only [n = 22 patients] | Ultrasound only [n = 11 patients] | Transillumination and ultrasound [n = 21 patients] | p-valuea | Total [n = 54 patients] |
| Age mean, years [median, range] | 68 [67, 44–86] | 60 [65, 27–76] | 62 [63, 23–81] | 0.2 | 64 [66, 23–86] |
| Sex, no. (%) | 0.5b | ||||
| Male | 9 (41) | 6 (55) | 12 (57) | 27 (50) | |
| Female | 13 (59) | 5 (45) | 9 (43) | 27 (50) | |
| Laterality, no. (%) | 0.3b | ||||
| Right | 16 (73) | 5 (45) | 14 (67) | 35 (65) | |
| Left | 6 (27) | 6 (55) | 7 (33) | 19 (35) | |
| Tumour size | |||||
| Mean base, mm [median, range] | 10.8 [10.5, 4.8–16.2] | 8.9 [9.1, 4.1–13.7] | 11.5 [11.1, 5.5–21.1] | 0.1 | 10.7 [10.4, 4.1–21.1] |
| Mean thickness, mm [median, range] | 3.9 [2.9, 1.7–13.1] | 2.9 [2.3, 1.9–8.7] | 4.8 [3.2, 1.7–14.3] | 0.2 | 4.0 [2.8, 1.7–14.3] |
| Tumour epicentre location | 0.054c | ||||
| Macula | 3 (14) | 6 (55) | 2 (10) | 11 (21) | |
| Macula to equator | 7 (31) | 4 (36) | 11 (52) | 22 (41) | |
| Equator to ora serrata | 9 (41) | 1 (9) | 7 (33) | 17 (31) | |
| Ciliary body | 3 (14) | 0 | 1 (5) | 4 (7) | |
| Tumour pigment, % [median, range] | 67 [70, 5–100] | 67 [80, 5–100] | 65 [70, 15–100] | 0.9 | 66 [70, 5–100] |
DTR distance between tumour margin and tantalum ring
aIndependent t-test
bChi-squared test
cFisher exact test