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| Clustering of childhood leukaemia in Hong Kong: Association with the childhood peak and common acute lymphoblastic leukaemia and with population mixing |
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| Author(s): Alexander FE, Chan LC, Lam TH, Yuen P, Leung NK, Ha SY, Yuen HL, Li CK, Lau YL, Greaves MF |
| Source: BRITISH JOURNAL OF CANCER Volume: 75 Issue: 3 Pages: 457-463 Published: 1997 |
| Times Cited: 62 References: 35 |
| Abstract: Incidence data of childhood leukaemia (CL) in Hong Kong (1984-90) have been analysed for evidence of variation between small areas. All cases (n=261) were classified by morphological cell type, with the majority (n=205) being acute lymphoblastic leukaemia (ALL), and haematological review has permitted immunophenotypic classification for 73% of these. The data have been examined for evidence of spatial clustering within small census areas (TPUs) and for association with population mixing, with attention focused on those subgroups (especially the childhood peak of ALL - taken here to be diagnoses in children from 24 months up to the seventh birthday - and common ALL) which, it has been hypothesized, may be caused by unusual patterns of exposure and response to common infections. For the whole of Hong Kong, there was evidence of spatial clustering of ALL at ages 0-4 years (P = 0.09) and in the childhood peak (P<0.05). When these analyses were restricted to TPUs where extreme population mixing may have occurred, overall incidence was elevated and significant evidence of clustering was found for ALL (P<0.007) at these ages and for the common ALL in the childhood peak (P = 0.032). Replication of the analyses for subsets of leukaemia that were not dominated by the childhood peak of ALL found no evidence of clustering. This is the first investigation of an association between population mixing and childhood leukaemia in Asia and the first to include clustering and to consider particular subsets. The results are supportive of the 'infectious' aetiology hypothesis for subsets of childhood leukaemia, specifically common ALL in the childhood peak. |
| Document Type: Article |
| Language: English |
| Reprint Address: Alexander, FE (reprint author), UNIV EDINBURGH, DEPT PUBL HLTH SCI, SCH MED, TEVIOT PL, EDINBURGH EH8 9AG, MIDLOTHIAN SCOTLAND |
Addresses:
1. QUEEN MARY HOSP, DEPT PATHOL, HONG KONG, HONG KONG
2. UNIV HONG KONG, DEPT COMMUNITY MED, HONG KONG, HONG KONG
3. PRINCE WALES HOSP, DEPT PAEDIAT, HONG KONG, HONG KONG
4. PRINCESS MARGARET HOSP, DEPT PAEDIAT, HONG KONG, HONG KONG
5. QUEEN MARY HOSP, DEPT PAEDIAT, HONG KONG, HONG KONG
6. QUEEN ELIZABETH HOSP, DEPT PAEDIAT, HONG KONG, HONG KONG
7. INST CANC RES, CHESTER BEATTY LABS, LEUKAEMIA RES FUND CTR, LONDON SW3 6JB, ENGLAND |
| Publisher: CHURCHILL LIVINGSTONE, JOURNAL PRODUCTION DEPT, ROBERT STEVENSON HOUSE, 1-3 BAXTERS PLACE, LEITH WALK, EDINBURGH EH1 3AF, MIDLOTHIAN, SCOTLAND |
| Subject Category: Oncology |
| IDS Number: WE648 |
| ISSN: 0007-0920 |
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