Author | Number of patients systemic treatment/ No systemic treatment | Length of follow up (range) | No. lost to follow up (%) | Overall recurrence in systemic treatment group | Overall recurrence in non systemic treatment group | Mean time from surgery to recurrence (range) |
Yu et al. [2] | 16/0 | 28 months (23 - 53) | 0 (0) | n = 0%, 0% | NA | NA |
Xu et al. [1] | 37/65 | 39.9 months (2 - 153) | 4 (3.8) | n = 4%, 10.8% (5.4% at 2 years) | n = 34%, 52.3% (36.9% at 2 years) | 20.9 months (2 - 82) |
Tse et al. [4] | 24/20 | 48 months-treatment group (24 - 84)/ 115.4 months-control group (32 - 192) | 0 (0) | n = 1%, 4.2% | n = 6%, 30% | 14.4 months (9 - 39) |
Cheng et al. [3] | 12/6 | (12 - 48) | 0 (0) | n = 1%, 8.3% | n = 4%, 66.7% | NR |
Totals | 89/91 | *49.9 (2 - 192) | 4 (2.2%) | n = 6%, 6.7% | n = 44%, 48.4% | (2 - 39) |