Table 2. Cumulative incidence (per 100,000) of kidney cancer from 2003 to 2005 in diabetic patients and non-diabetic people by age and the unadjusted odds ratios comparing diabetic patients to non-diabetic people.

Age	Type 2 diabetes mellitus				Odds ratio (95% confidence interval)	P
	Yes		No
	n / N	3-year cumulative incidence	n / N	3-year cumulative incidence
Diabetes mellitus of any duration
All ages	193 / 115655	166.9	292 / 883073	33.1	5.1 (4.2–6.1)	<0.01
Age <40 years	8 / 17270	46.3	42 / 570472	7.4	6.3 (3.0–13.4)	<0.01
Age 40–64 years	57 / 57199	99.7	147 / 253826	57.9	1.7 (1.3–2.3)	<0.01
Age 65–74	60 / 23181	258.8	60 / 34486	174.0	1.5 (1.0–2.1)	<0.05
Age ≥75	68 / 18005	377.7	43 / 24289	177.0	2.1 (1.5–3.1)	<0.01
Sensitivity analysis after excluding patients with diabetes mellitus diagnosis for <5 years
All ages	129 / 69494	185.6	292 / 883073	33.1	5.6 (4.6–6.9)	<0.01
Age <40 years	2 / 8586	23.3	42 / 570472	7.4	3.2 (0.8–13.1)	0.11
Age 40–64 years	34 / 32361	105.1	147 / 253826	57.9	1.8 (1.3–2.6)	<0.01
Age 65–74	41 / 15716	260.9	60 / 34486	174.0	1.5 (1.0–2.2)	<0.05
Age ≥75	52 / 12831	405.3	43 / 24289	177.0	2.3 (1.5–3.4)	<0.01

n: case number of kidney cancer, N: case number observed