Table 3. Distribution of incident cancer cases lost to follow-up, among those registered in 1990–1999 and followed through 2001, PBCR, Chennai, India.
| Tumour site/type | Losses to follow-up by years from diagnosis (%) |
|||
|---|---|---|---|---|
| < 1 | 1–3 | 3–5 | > 5 | |
| Lip | 7.0 | 2.3 | 0.0 | 25.6 |
| Tongue | 13.1 | 2.6 | 1.2 | 7.5 |
| Oral cavity | 10.3 | 2.2 | 1.8 | 12.2 |
| Tonsil | 4.8 | 0.8 | 0.0 | 12.4 |
| Hypopharynx | 9.0 | 0.6 | 0.0 | 2.3 |
| Oesophagus | 6.7 | 0.9 | 0.4 | 1.8 |
| Stomach | 7.3 | 0.9 | 0.9 | 1.5 |
| Pancreas | 3.1 | 0.3 | 0.3 | 0.6 |
| Larynx | 6.7 | 0.8 | 0.3 | 9.4 |
| Lung | 8.0 | 0.7 | 0.3 | 1.4 |
| Breast | 12.4 | 2.9 | 2.0 | 6.0 |
| Cervix | 11.0 | 3.7 | 2.5 | 20.8 |
| Ovary | 14.7 | 4.6 | 1.4 | 1.9 |
| Urinary bladder | 10.9 | 1.6 | 0.2 | 4.3 |
| Hodgkin lymphoma | 6.4 | 1.7 | 1.0 | 8.7 |
| Non-Hodgkin lymphoma | 10.9 | 1.3 | 0.6 | 2.9 |
| Lymphoid leukaemia | 2.8 | 3.2 | 3.5 | 4.6 |
| Myeloid leukaemia | 8.6 | 1.3 | 0.4 | 3.7 |
| Leukaemia, type unspecified | 10.5 | 0.0 | 0.0 | 2.4 |
PBCR, population-based cancer registry.