Table 3. Mortality rates of rheumatic heart disease and adjusted rate ratios for people <70 years of age, according to key sociodemographic characteristics, New Zealand, 2000–2016*.

Category	No. deaths	Crude rate of RHD deaths/100,000 population	aRR (95% CI)	RR during 2010–2016 vs. 2000–2009 (95% CI)
Age, y†
<40	126	0.31	Referent	0.66 (0.45–0.96)
40–49	163	1.56	7.27 (5.76–9.18)	0.68 (0.49–0.94)
50–59	249	2.80	15.09 (12.17–18.72)	0.53 (0.41–0.70)
60–69	352	5.48	34.15 (27.80–41.95)	0.56 (0.45–0.69)
Sex‡
M	394	1.21	0.88 (0.75–0.98)	0.56 (0.45–0.69)
F	496	1.49	Referent	0.61 (0.51–0.73)
Ethnicity§
Māori	467	4.34	12.27 (10.32–14.58)	0.53 (0.44–0.65)
Pacific Islander	190	4.37	11.16 (9.05–13.76)	0.77 (0.57–1.02)
Asian	20	0.29	0.8 7(0.55–1.38)	0.09 (0.02–0.40)
European and other	213	0.49	Referent	0.63 (0.47–0.84)
Socioeconomic deprivation level¶
1–2	48	0.39	Referent	0.23 (0.11–0.46)
3–4	67	0.55	1.23 (0.85–1.78)	0.51 (0.30–0.84)
5–6	113	0.88	1.72 (1.23–2.42)	1.01 (0.70–1.46)
7–8	188	1.37	2.17 (1.57–2.99)	0.54 (0.40–0.73)
9–10	474	3.18	3.18 (2.34–4.33)	0.58 (0.48–0.71)
District health board#
Northland	52	2.18	1.13 (0.76–1.69)	0.48 (0.24–0.94)
Counties Manukau, South Auckland	168	2.28	1.65 (1.21–2.24)	0.75 (0.53–1.05)
Tairawhiti, Gisborne	33	4.56	2.22 (1.42–3.48)	0.35 (0.15–0.83)
South Island, 5 DHBs	81	0.53	Referent	0.50 (0.31–0.82)
Total	890	1.35		0.58 (0.51–0.67)

*An additional 1,545 (63.4% of total) deaths occurred among persons >70 years of age during 2000–2016. aRR, adjusted rate ratio; DHB, district health board; RHD, rheumatic heart disease; RR, rate ratio.
†RR adjusted for sex, ethnicity, and socioeconomic deprivation.
‡RR adjusted for age, ethnicity, and socioeconomic deprivation.
§RR adjusted for age, sex, and socioeconomic deprivation.
¶RR adjusted for age, sex, and ethnicity.
#RR adjusted for age, sex, ethnicity, and socioeconomic deprivation; 3 highest incidence DHBs and the DHB with lowest incidence shown. A full list of DHBs is provided in Appendix Table 1.