to 9·33)*1738·30 (616·68 to 2847·07)2376·30 (847·55 to 3851·52)36·70 (34·59 to 39·02)*7·55 (5·95 to 9·37)*4Occupational exposure to formaldehyde: all causes0·95 (0·78 to 1·15)1·09 (0·90 to 1·32)13·89 (5·40 to 22·94)*–4·03 (−10·29 to 2·45)42·70 (35·09 to 51·51)46·93 (38·81 to 56·99)9·90 (1·78 to 18·05)*–5·67 (−12·09 to 0·77)··Nasopharynx cancer0·42 (0·29 to 0·58)0·48 (0·33 to 0·68)13·08 (−1·13 to 29·19)–6·37 (−16·69 to 4·83)17·57 (11·88 to 24·10)19·02 (12·99 to 27·09)8·25 (−5·73 to 24·38)–8·78 (−19·03 to 3·13)··Acute lymphoid leukaemia0·09 (0·08 to 0·11)0·13 (0·11 to 0·15)34·88 (18·69 to 42·16)*16·60 (3·46 to 22·11)*4·72 (3·86 to 5·83)6·21 (5·02 to 7·60)31·43 (16·61 to 38·79)*15·52 (2·59 to 21·35)*··Chronic lymphoid leukaemia0·02 (0·02 to 0·03)0·03 (0·03 to 0·04)30·39 (20·80 to 38·61)*7·25 (0·20 to 13·50)*0·95 (0·79 to 1·17)1·22 (1·02 to 1·44)27·96 (16·27 to 37·10)*7·86 (−0·97 to 15·12)··Acute myeloid leukaemia0·11 (0·09 to 0·13)0·15 (0·12 to 0·18)35·38 (28·55 to 41·33)*15·11 (9·74 to 19·69)*5·06 (4·14 to 6·15)6·70 (5·54 to 8·16)32·57 (25·83 to 39·02)*14·91 (9·32 to 20·00)*··Chronic myeloid leukaemia0·04 (0·04 to 0·05)0·05 (0·04 to 0·06)6·23 (0·31 to 13·49)*–9·89 (−14·91 to −4·16)*2·05 (1·66 to 2·53)2·15 (1·73 to 2·65)4·77 (−1·61 to 12·57)–9·72 (−15·13 to −3·27)*··Other leukaemia0·26 (0·21 to 0·31)0·26 (0·21 to 0·31)–1·61 (−9·46 to 6·91)–15·64 (−21·92 to −9·05)*12·35 (9·66 to 14·91)11·64 (9·27 to 14·19)–5·80 (−13·73 to 2·60)–17·95 (−24·52 to −11·12)*4Occupational exposure to nickel:
