Table 6

Study of crude oil workers: SMRs for lymphohaematopoietic cancer, white men, 1946–94

Observed Expected SMR 95% CI
Non-Hodgkin's lymphoma3245.96947 to 98
Multiple myeloma2318.712277 to 184
Leukaemia4950.39772 to 129
Acute lymphocytic leukaemia (ALL)32.910420 to 305
Chronic lymphocytic leukaemia (CLL)59.65216 to 121
Acute myelogenous leukaemia (AML)168.3192110 to 313
Ever employed as roustabout124.3276142 to 482
Ever employed as pumper93.2280127 to 531
Ever employed in maintenance42.714839 to 380
Ever employed in pipeline field41.624766 to 632
First employed <1940112.9374186 to 670
First employed 1940 to 922.6778 to 280
First employed ⩾195032.910521 to 307
Employed <20 y33.48817 to 257
Employed ⩾20 y134.9265141 to 453
Chronic myelogenous leukaemia (CML)66.39434 to 205
Acute unspecified leukaemia (AUL)42.715040 to 384
Unspecified leukaemia (UL)63.417564 to 382