Bulletin of the World Health Organization

Lack of active follow-up of cancer patients in Chennai, India: implications for population-based survival estimates

Rajaraman Swaminathan, Ranganathan Rama, Viswanathan Shanta

Volume 86, Number 7, July 2008, 509-515

Table 4. Five-year absolute survival under different assumptions regarding survival status among incident cancer cases registered in 1990–1999 and followed through 2001, PBCR, Chennai, India

Tumour site/type 5-year absolute survival (%)
Passive follow-up
Active follow-up
Case 1a Case 2b Case 3c Case 4d
Lip 79.5 44.6 40.7 39.5
Tongue 62.1 29.2 19.4 15.4
Oral cavity 68.5 37.1 30.5 26.4
Tonsil 58.5 17.2 13.7 10.8
Hypopharynx 59.2 20.0 12.5 9.6
Oesophagus 48.9 12.9 6.9 5.0
Stomach 47.9 15.0 8.6 5.6
Pancreas 41.8 10.9 7.9 6.5
Larynx 59.0 35.1 30.7 28.4
Lung 40.8 13.2 6.5 4.2
Breast 71.6 51.5 43.7 39.6
Cervix 75.5 59.0 54.0 49.4
Ovary 60.1 39.5 27.4 21.1
Urinary bladder 61.3 31.0 23.2 20.0
Hodgkin lymphoma 69.1 42.6 39.4 35.9
Non-Hodgkin lymphoma 55.6 29.7 21.6 16.8
Lymphoid leukaemia 54.3 26.5 23.8 15.5
Myeloid leukaemia 40.4 21.5 14.7 10.9
Leukaemia, type unspecified 32.9 17.8 10.9 6.2

PBCR, population-based cancer registry.a Case 1: Passive follow-up only, with cancer cases not matched with those in the official mortality database presumed to be alive on the closing date.b Case 2: Passive and active follow-up, with cases lost to follow-up presumed to be alive on the closing date.c Case 3: Passive and active follow-up, with cases lost to follow-up censored on the last date their survival status was known.d Case 4: Passive and active follow-up, with cases lost to follow-up excluded from survival analysis.

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