Table V.

Period prevalence in each age group and sex.

Age group	Male prevalence (per 100,000 population) (95% CI)	Female prevalence (per 100,000 population) (95% CI)	Male:female ratio (95% CI)
15–24	0	1.41 (0.29 to 4.13)	–
25–34	4.45 (2.30 to 7.77)	1.78 (0.58 to 4.15)	2.5 (0.89–19.66)
35–44	7.81 (4.83 to 11.94)	3.27 (1.50 to 6.21)	2.4 (1.13–7.08)
45–54	29.59 (22.84 to 37.72)	12.27 (8.16 to 17.74)	2.4 (1.58–4.00)
55–64	56.22 (45.59 to 68.58)	33.51 (25.64 to 43.05)	1.67 (1.23–2.34)
65–74	47.33 (36.37 to 60.55)	37.95 (28.89 to 48.95)	1.24 (0.87–1.80)
75+	17.62 (10.44 to 27.85)	12.26 (7.68 to 18.56)	1.4 (0.71–2.77)

The male:female ratio drops after age 55 years.