Table 1.

Characteristics of people with OA identified in the population

Population	Age groups (years)	Female			Male			Total
		n	% by age groups	% (Female)	n	% by age groups	% (Male)
People meeting OA case definition	<35	13 975	50.6	4.9	13 638	49.4	6.5	27 613
	35–44	25 616	52.4	8.9	23 279	47.6	11.1	48 895
	45–54	57 574	57.6	20.0	42 445	42.4	20.3	100 019
	55–64	65 528	57.1	22.8	49 329	42.9	23.6	114 857
	65–74	59 346	57.7	20.6	43 527	42.3	20.8	102 873
	75+	65 912	63.9	22.9	37 193	36.1	17.8	103 105
	Total	287 951	57.9	100.0	209 411	42.1	100.0	497 362

% by age groups was calculated using total population of each specific age group (eg, for OA <35 years), the percentage was calculated using the number of females with OA as the numerator and the total number of people with OA as the denominator (13 975+13 638= 27 613). % female <35 years was calculated using the number of females in the age group <35 years as the numerator (13 975) and the number of females with OA as the denominator (287 951).

OA, osteoarthritis.