Variable Groups Patients Univariate analysis HR (95% CI) Multivariate analysis HR (95% CI) Age Age 0-19 10 1 (reference) - 1 (reference) - Age 20-39 47 1.038 (0.431-2.500) 0.933 0.784 (0.316-1.945) 0.599 Age 40-59 80 1.696 (0.716-4.017) 0.230 1.320 (0.538-3.240) 0.545 Age 60-79 68 2.431 (0.999-5.914) 0.050 2.000 (0.804-4.978) 0.136 Age 80+ 10 8.199 (2.400-28.009) <0.001 8.566 (2.320-31.626) <0.01 Sex Male 95 1 (reference) - 1 (reference) - Female 120 1.10404 (0.763-1.597) 0.6 0.903 (0.600-1.359) 0.625 Race White 177 1 (reference) - 1 (reference) - Black 21 1.768 (0.962-3.250) 0.067 2.520 (1.309-4.853) <0.01 Other 17 2.322 (1.198-4.501) 0.013 2.989 (1.498-5.964) <0.01 Location Soft tissue and skin 67 1 (reference) - 1 (reference) - Respiratory lesions 42 2.311 (1.272-4.198) <0.001 2.551 (1.370-4.749) <0.01 Bone and joints 18 1.418 (0.739-2.721) 0.29 1.877 (0.921-3.823) 0.083 Abdominal lesions 61 1.205 (0.758-1.916) 0.431 1.252 (0.771-2.035) 0.364 Head and necks 8 0.542 (0.240-1.225) 0.141 0.609 (0.254-1.459) 0.266 Others 19 1.463 (0.605-3.533) 0.398 1.360 (0.523-3.530) 0.530 Surgery No surgery 115 1 (reference) - 1 (reference) - Surgery 100 0.820 (0.563-1.193) 0.299 0.970 (0.640-1.474) 0.887