Table 1 Classification variables used in decision tree analysis
From: Determine the therapeutic role of radiotherapy in administrative data: a data mining approach
Classification variables | Description | Completeness* | |
|---|---|---|---|
Curative | Palliative | ||
Fraction size (cGy) | Median: 200 | Median: 300 | 99% |
Time from the first treatment (no. of days) | Median: 19 | Median: 9 | 100% |
Body-region group | 91% | ||
Chest | 123,378 (91%) | 12144 (9%) | |
Organs and tissues in pelvis region | 78,220 (97%) | 2211 (3%) | |
Pelvis – single side | 1,057 (44%) | 1332 (56%) | |
Pelvis – both sides | 27,902 (91%) | 2685 (9%) | |
Brain | 9,177 (52%) | 8589 (48%) | |
Neck | 16,378 (92%) | 1336 (8%) | |
Head | 14,256 (93%) | 1020 (7%) | |
Bone – spine, limb, chest, head | 3,817 (21%) | 14353 (79%) | |
Abdomen | 7,206 (73%) | 2614 (27%) | |
Skin | 983 (73%) | 357 (27%) | |
Other regions | 7,116 (96%) | 262 (4%) | |
Disease site group | 97% | ||
Head/neck(140–144,146-149,160,161) | 26,090 (97%) | 924 (3%) | |
Other head/neck | 3,735 (92%) | 309 (8%) | |
Colon/intestines (152,153) | 1,782 (58%) | 1,271 (42%) | |
Rectum (154) | 17,585 (91%) | 1,709 (9%) | |
Liver (155) | 140 (38%) | 226 (62%) | |
Other GI (150,151,156-159) | 6,736 (74%) | 2,349 (26%) | |
Lung (162–165) | 18,850 (55%) | 1,5319 (45%) | |
Bone (170) | 245 (68%) | 114 (32%) | |
Soft tissue (171) | 1,942 (86%) | 303 (14%) | |
Melanoma (172) | 1,390 (54%) | 1,204 (46%) | |
skin (173) | 134(85%) | 23(15%) | |
Breast (174,175) | 97,728 (93%) | 6,897 (7%) | |
Ovary (183) | 461 (46%) | 541 (54%) | |
Other GYN (179–182,184) | 1,2791 (90%) | 1,391 (10%) | |
Prostate/Testis/Penis (185–187) | 74,061 (95%) | 3,896 (5%) | |
Bladder (188) | 2,206 (67%) | 1,075 (33%) | |
Kidney (189) | 464 (24%) | 1,504 (76%) | |
CNS (190–192) | 7,524 (93%) | 604 (7%) | |
Thyroid/Endo (193,194) | 727 (70%) | 318 (30%) | |
Unspecified group 1 (195,196) | 1,271 (88%) | 176 (12%) | |
Unspecified group 2 (197–199) | 4,152 (66%) | 2,153 (34%) | |
Lymphoid/leukemia(200,202,204-208) | 7,295 (71%) | 2,933 (29%) | |
Hodgkin’s disease (201) | 1,697 (94%) | 116 (6%) | |
Myeloma (203) | 484 (24%) | 1,548 (76%) | |