Table 2.

Incidence and recurrence rates of colorectal neoplasia in detail—all neoplasias

Initial lesion	Sex	Age group (y)
		<40	40–49	50–59	⩾60
None	Female	3.1 [1.3–6.3]	3.2 [2.4–4.2]	6.7 [5.4–8.4]	7.3 [4.5–11.3]
		7/86×2.66	53/576×2.90	74/451×2.46	19/104×2.50
	Male	4.7 [3.9–5.9]	8.2 [7.5–9.2]	10.1 [9.0–11.7]	11.4 [9.1–14.2]
		88/567×3.28	336/1348×3.02	198/722×2.70	73/230×2.79
Small adenoma	Female	7.9 [1.0–27.0]	11.4 [8.1–15.9]	14.1 [10.5–18.9]	20.4 [14.1–29.4]
		2/11×2.29	33/117×2.47	42/121×2.46	25/56×2.19
	Male	15.1 [11.7–19.8]	18.9 [17.2–21.3]	22.2 [20.3–25.2]	25.1 [21.4–29.7]
		51/130×2.60	289/606×2.52	264/543×2.19	115/234×1.96
Advanced lesion	Female	0.0 [0.0–70.8]	3.2 [0.1–16.7]	16.3 [6.4–32.8]	10.7 [3.0–25.4]
		0/1×3.01	1/12×2.63	6/20×1.84	4/11×3.38
	Male	14.7 [3.2–37.9]	24.6 [18.8–32.4]	26.7 [22.0–33.1]	24.4 [17.8–32.9]
		3/11×1.86	42/79×2.16	72/118×2.28	34/71×1.96

Each cell represents “annual incidence rate (%/year) [95% confidence interval]” in the top row, and “number of cases with adenomas”/“number of subjects followed up “×”mean follow up time (year)” in the bottom row.