Table 1.

The number of patients in the cohort, the number with cancer, and the cancer incidence for males, females, 40–69 year olds, and ≥70 year olds, in the microcytosis and normal MCV cohorts

	Microcytosis			Normal MCV
	N	With cancer	Cancer incidence, % (95% CI)	N	With cancer	Cancer incidence, % (95% CI)
Males	4800	298	6.21 (5.54 to 6.93)^a	34 653	940	2.71 (2.54 to 2.89)
Females	7489	199	2.66 (2.30 to 3.05)	38 497	525	1.36 (1.25 to 1.48)
Aged 40–69	4647	125	2.69 (2.24 to 3.20)	32 631	437	1.34 (1.22 to 1.47)
Aged 70	7642	372	4.87 (4.40 to 5.37)^a	40 519	1028	2.54 (2.39 to 2.69)

↵a Incidence >3% NICE threshold for referral. MCV = mean cell volume. NICE = National Institute for Health and Care Excellence.