Table 3.
Changes in the incidence of subarachnoid haemorrhage in New Zealand between 2001 and 2018 by sex, ethnicity and region.
| Age-standardised incidence of SAH per 100,000 person-years (95% CI)a |
Adjusted RR (95% CI) between 2001–2003 and 2016–2018b | Annual decrease in % (95% CIs)b | ||
|---|---|---|---|---|
| 2001–2003 | 2016–2018 | |||
| Overall | 10.8 (10.2–11.4) | 7.1 (6.7–7.5) | 0.66 (0.60–0.72) | 2.3 (1.8–2.8) |
| By sex | ||||
| Men | 7.2 (6.5–7.8) | 5.1 (4.6–5.6) | 0.72 (0.62–0.85) | 1.9 (1.0–2.8) |
| Women | 14.0 (13.1–15.0) | 8.9 (8.2–9.6) | 0.63 (0.56–0.71) | 2.5 (1.9–3.2) |
| By ethnicity | ||||
| European/others | 10.1 (9.4–10.7) | 6.0 (5.5–6.4) | 0.60 (0.54–0.67) | 2.9 (2.3–3.6) |
| Māori | 17.3 (15.4–19.2) | 13.3 (11.9–14.8) | 0.81 (0.66–1.00) | 1.1 (−0.1 to 2.3) |
| Pacific peoples | 8.3 (6.2–10.5) | 9.0 (7.1–10.9) | 1.22 (0.77–1.94) | −1.4 (−3.8 to 1.0) |
| Asian | 10.4 (8.3–12.5) | 5.9 (4.8–6.9) | 0.77 (0.51–1.19) | 1.1 (−1.2 to 3.3) |
| By region | ||||
| Northland (R) | 12.5 (9.2–15.8) | 10.1 (7.5–12.8) | 0.82 (0.55–1.23) | 1.7 (−0.6 to 3.9) |
| Waitemata (U) | 10.8 (9.0–12.5) | 7.1 (5.8–8.3) | 0.71 (0.54–0.93) | 2.0 (0.4–3.5) |
| Auckland (U) | 10.3 (8.5–12.2) | 6.3 (5.0–7.5) | 0.63 (0.45–0.86) | 2.8 (1.1–4.5) |
| Counties Manukau (U) | 11.8 (9.9–13.7) | 8.3 (6.9–9.7) | 0.80 (0.60–1.06) | 1.6 (0.0–3.2) |
| Waikato (U) | 12.6 (10.4–14.8) | 8.1 (6.5–9.7) | 0.61 (0.45–0.82) | 3.3 (1.6–5.0) |
| Lakes (R) | 13.8 (9.6–18.0) | 8.0 (5.0–11.0) | 0.59 (0.34–1.01) | 2.6 (−0.5 to 5.6) |
| Bay of Plenty (U) | 12.5 (9.6–15.4) | 9.1 (6.9–11.3) | 0.70 (0.49–1.00) | 2.2 (0.1–4.4) |
| Tairawhiti (R) | 18.2 (11.0–25.3) | 10.9 (5.5–16.2) | 0.56 (0.28–1.11) | 3.4 (−0.7 to 7.4) |
| Hawke's Bay (R) | 12.9 (9.6–16.2) | 5.0 (3.1–7.0) | 0.38 (0.23–0.63) | 4.8 (2.3–7.2) |
| Taranaki (R) | 6.2 (3.5–9.0) | 7.5 (4.6–10.3) | 1.35 (0.71–2.58) | −1.2 (−4.6 to 2.1) |
| MidCentral (R) | 7.8 (5.3–10.3) | 6.6 (4.4–8.8) | 0.83 (0.50–1.37) | 0.7 (−2.1 to 3.4) |
| Whanganui (R) | 10.9 (6.2–15.5) | 6.1 (2.7–9.6) | 0.56 (0.26–1.18) | 2.9 (−0.8 to 6.6) |
| Capital & Coast (U) | 8.4 (6.4–10.4) | 6.3 (4.7–7.9) | 0.75 (0.50–1.13) | 1.6 (−0.7 to 3.8) |
| Hutt Valley (U) | 8.4 (5.6–11.1) | 7.5 (4.9–10.0) | 0.88 (0.52–1.49) | −0.2 (−3.4 to 2.8) |
| Wairarapa (R) | 7.8 (2.8–12.9) | 3.2 (0.2–6.2) | 0.44 (0.13–1.52) | 0.6 (−5.3 to 6.1) |
| Nelson Marlborough (R) | 9.7 (6.6–12.8) | 7.2 (4.7–9.6) | 0.75 (0.46–1.21) | 1.4 (−1.3 to 4.1) |
| West Coast (R) | 10.0 (3.6–16.4) | 8.0 (2.4–13.6) | 0.67 (0.24–1.88) | 2.5 (−3.4 to 8.0) |
| Canterbury (U) | 11.1 (9.4–12.9) | 5.7 (4.5–6.8) | 0.51 (0.38–0.69) | 3.3 (1.7–4.8) |
| South Canterbury (R) | 9.5 (4.8–14.2) | 5.8 (2.3–9.3) | 0.59 (0.27–1.30) | 2.8 (−1.7 to 7.1) |
| Southern (U) | 11.8 (9.5–14.1) | 7.1 (5.4–8.8) | 0.59 (0.43–0.82) | 2.8 (0.9–4.7) |
| Urban regions combined | 10.9 (10.3–11.6) | 7.1 (6.6–7.6) | 0.66 (0.59–0.73) | 2.4 (1.8–3.0) |
| Rural regions combined | 10.7 (9.5–11.8) | 7.2 (6.3–8.1) | 0.67 (0.56–0.80) | 2.1 (1.1–3.0) |
CI, confidence interval; R, rural region; RR, rate ratio; SAH, subarachnoid haemorrhage; U, urban region.
a
Standardised to the age structure of the European Standard Population in 2013.
b
Adjusted for age, sex, ethnicity and region.