Table 2.

 Incidence rates (%) of new diagnosis of cancer for all patients who underwent hip replacement

	No excluded (previous diagnosis)	No at risk	Total time (years) observed	No with diagnosis	Incidence rate (95% CI)
					One year	Five years
Stemmed metal-on-metal
Any cancer	1078	20 186	58 338	653	1.00 (0.87 to 1.15)	5.65 (5.13 to 6.23)
Haematological cancer	108	21 156	61 545	107	0.13 (0.09 to 0.19)	0.92 (0.72 to 1.17)
Malignant melanoma	51	21 213	61 721	24	0.04 (0.02 to 0.08)	0.21 (0.13 to 0.33)
Prostate cancer	185	10 786	30 435	117	0.35 (0.25 to 0.48)	1.92 (1.52 to 2.42)
Renal cancer	104	21 160	61 558	67	0.12 (0.08 to 0.18)	0.53 (0.39 to 0.73)
Resurfacing
Any cancer	372	18 940	69 358	445	0.50 (0.41 to 0.62)	3.34 (3.01 to 3.72)
Haematological cancer	46	19 266	71 131	55	0.05 (0.03 to 0.10)	0.41 (0.30 to 0.54)
Malignant melanoma	28	19 284	71 253	20	0.02 (0.01 to 0.06)	0.12 (0.07 to 0.21)
Prostate cancer	48	12 882	45 692	80	0.14 (0.09 to 0.22)	0.91 (0.71 to 1.16)
Renal cancer	50	19 262	71 134	46	0.05 (0.03 to 0.10)	0.36 (0.26 to 0.49)
Other bearing surfaces
Any cancer	16 780	232 215	686 500	10 845	1.34 (1.29 to 1.39)	8.17 (8.00 to 8.36)
Haematological cancer	1769	247 226	738 237	1835	0.21 (0.19 to 0.23)	1.31 (1.24 to 1.38)
Malignant melanoma	722	248 273	741 432	415	0.05 (0.04 to 0.06)	0.28 (0.25 to 0.31)
Prostate cancer	2917	88 737	261 665	1558	0.51 (0.47 to 0.57)	3.09 (2.91 to 3.27)
Renal cancer	2058	246 937	737 004	1088	0.11 (0.10 to 0.14)	0.76 (0.71 to 0.81)
All hip replacement
Any cancer	18 230	271 341	814 196	11 945	1.25 (1.21 to 1.30)	7.58 (7.42 to 7.74)
Haematological cancer	1923	287 648	870 914	1997	0.19 (0.18 to 0.21)	1.21 (1.15 to 1.27)
Malignant melanoma	801	288 770	874 456	459	0.05 (0.04 to 0.06)	0.26 (0.23 to 0.29)
Prostate cancer	3153	112 405	337 792	1755	0.45 (0.41 to 0.45)	2.68 (2.54 to 2.84)
Renal cancer	2212	287 359	869 696	1201	0.11 (0.10 to 0.12)	0.71 (0.66 to 0.76)