Table 3.

Average prevalence rates, 1990–2010, of recorded diagnoses of Huntington's disease by age group (per 100 000)

Age group (years)	Average population numbers	Average HD numbers	Average prevalence (95% CIs)
21–25	202 852	4	2.0 (0.5 to 5.1)
26–30	223 488	7	3.1 (1.3 to 6.5)
31–35	240 698	15	6.2 (3.5 to 10.3)
36–40	249 476	23	9.2 (5.8 to 13.8)
41–45	241 745	28	11.6 (7.7 to 16.7)
46–50	225 037	32	14.2 (9.7 to 20.1)
51–55	208 745	33	15.81 (10.9 to 22.2)
56–60	193 437	30	15.8 (10.5 to 22.1)
61–65	169 441	26	15.3 (10.0 to 22.5)
66–70	144 295	21	14.6 (9.0 to 22.3)
71–75	125 812	13	10.3 (5.5 to 17.7)
76–80	102 360	9	8.8 (4.0 to 16.7)
81–85	72 092	4	5.6 (1.5 to 14.2)
86+	59 105	1	1.7 (0 to 9.4)

HD, Huntington's disease.