Table 1 Comparison of characteristics between the groups
Variables | GSS (n = 187) | Saline (n = 83) | No TS (n = 107) | P-value |
|---|---|---|---|---|
Age (y), median (range) | 66 (26–88) | 67 (29–83) | 64 (31–86) | 0.31 |
Sex, n (%) | 0.62 | |||
Male | 104 (55.6) | 47 (56.6) | 54 (50.5) | |
Female | 83 (44.4) | 36 (43.4) | 53 (49.5) | |
Emphysema, n (%) | 102 (54.5) | 50 (60.2) | 61 (57) | 0.68 |
Patient position, n (%) | 0.018 | |||
Supine | 89 (47.6) | 38 (45.8) | 51 (47.7) | |
Prone | 87 (46.5) | 41 (49.4) | 39 (36.4) | |
Lateral | 11 (5.9) | 4 (4.8) | 17 (15.9) | |
Track length (mm), median (range) | 26 (1–84) | 30 (1–64) | 25 (1–78) | 0.56 |
Operator, n (%) | < 0.0001 | |||
1 | 109 (58.3) | 35 (42.2) | 13 (12.1) | |
2 | 14 (7.5) | 17 (20.5) | 0 (0) | |
3 | 30 (16) | 19 (22.9) | 77 (72) | |
4 | 34 (18.2) | 12 (14.5) | 17 (15.9) | |
Follow-up CT type, n (%) | 0.077 | |||
High resolution CT | 98 (52.4) | 32 (38.6) | 60 (56.1) | |
PET/CT | 48 (25.7) | 32 (38.6) | 31 (29) | |
RT planning CT | 41 (21.9) | 19 (22.9) | 16 (15) | |
Time between biopsy and follow-up CT (d), median (range) | 31 (1–61) | 32 (3–59) | 24 (3–61) | 0.002 |