Table 2 Proportion of Selected Disease Sites Mentioned on Proton Therapy Centre Websites
Site | All Websites % (n)(N = 46) | US Websites % (n) (N = 22) | International Websites % (n) (N = 24) | US v. Int’l p-value |
|---|---|---|---|---|
Number of Sites Listed | ||||
 (mean ± SD) | 12.8 ± 6.1 | 15.5 ± 5.4 | 10.4 ± 5.8 | 0.004 |
Adult CNS (any)* | 89.1% (41) | 95.5% (21) | 83.3% (20) | 0.349 |
 Benign | 58.7% (27) | 63.6% (14) | 54.2% (13) | 0.515 |
 Glioma (High or Low Grade) | 45.7% (21) | 50.0% (11) | 41.7% (10) | 0.571 |
 Other (e.g. base of skull) | 65.2% (30) | 59.1% (13) | 70.8% (17) | 0.404 |
 Spine | 58.7% (26) | 77.3% (17) | 41.7% (10) | 0.014 |
Bladder | 19.6% (9) | 27.3% (6) | 12.5% (3) | 0.276 |
Breast | 50.0% (23) | 77.3% (17) | 25.0% (6) | <  0.001 |
Eye/Orbit | 58.7% (27) | 68.2% (15) | 50.0% (12) | 0.211 |
GI (any)* | 76.1% (35) | 90.9% (20) | 62.5% (15) | 0.024 |
 Anal | 17.4% (8) | 36.4% (8) | 0% (0) | 0.001 |
 Colorectal | 39.1% (18) | 54.6% (12) | 25.0% (6) | 0.040 |
 Esophagus | 43.5% (20) | 54.6% (12) | 33.3% (8) | 0.147 |
 Liver | 56.5% (26) | 54.6% (12) | 58.3% (14) | 0.796 |
 Pancreatobiliary | 52.2% (24) | 68.2% (15) | 37.5% (9) | 0.037 |
 Stomach | 17.4% (8) | 31.8% (7) | 4.2% (1) | 0.020 |
Gynecologic | 30.4% (14) | 36.4% (8) | 25.0% (6) | 0.403 |
Head and Neck | 87.0% (40) | 90.9% (20) | 83.3% (20) | 0.667 |
Kidney | 13.0% (6) | 4.6% (1) | 20.8% (5) | 0.190 |
Lymphoma | 41.3% (19) | 68.2% (15) | 16.7% (4) | <  0.001 |
Lung | 76.1% (35) | 95.5% (21) | 58.3% (14) | 0.003 |
Pediatric Tumours | 82.6% (38) | 95.5% (21) | 70.8% (17) | 0.049 |
Prostate | 87.0% (40) | 95.5% (21) | 79.2% (19) | 0.190 |
Recurrent Disease | 54.4% (25) | 54.6% (12) | 54.2% (13) | 0.979 |
Sarcoma | 67.4% (31) | 81.8% (18) | 54.2% (13) | 0.046 |