Volume 26, Number 6—June 2020
Research
Distribution of Streptococcal Pharyngitis and Acute Rheumatic Fever, Auckland, New Zealand, 2010–2016
Jane Oliver
, Arlo Upton, Susan J. Jack, Nevil Pierse, Deborah A. Williamson, and Michael G. Baker
, Arlo Upton, Susan J. Jack, Nevil Pierse, Deborah A. Williamson, and Michael G. Baker
Table
Comparison of GAS pharyngitis and ARF rates in the Auckland region, New Zealand, 2014–2016*
| Characteristic |
GAS pharyngitis in PHCs |
GAS pharyngitis in PHCs and schools |
Initial ARF hospitalizations |
|||||
| Mean annual incidence† |
RR (95% CI) |
Mean annual incidence† |
RR (95% CI) |
Mean annual incidence† |
RR (95% CI) |
|||
| Total |
15.7 |
Referent NA |
28.1 |
Referent NA |
0.1 |
Referent NA |
||
| Age group, y | ||||||||
| 0–4 | 26.9 | 2.7 (2.6–2.9) | 28.7 | 2.8 (2.6–2.9) | 0.7 | 0.1 (0.0–0.4) | ||
| 5–9 | 82.9 | 8.2 (7.8–8.6) | 204.8 | 18.1 (17.4–18.9) | 17.8 | 2.5 (1.7–3.8) | ||
| 10–14 | 44.3 | 4.5 (4.2–4.7) | 99.7 | 9.3 (8.9–9.7) | 32.5 | 4.7 (3.3–6.7) | ||
| 15–19 | 17.3 | 1.8 (1.6–1.9) | 20.4 | 2.0 (1.9–2.1) | 9.2 | 1.3 (0.8–2.1) | ||
| 20–29 | 9.9 | Referent | 10.3 | Referent | 7.1 | Referent | ||
| 30–39 | 11.1 | 1.1 (1.1–1.2) | 11.5 | 1.1 (1.0–1.2) | 1.7 | 0.2 (0.1–0.5) | ||
| >40 |
2.5 |
0.3 (0.2–0.3) |
2.6 |
0.2 (0.2–0.3) |
0.0 |
0.0 (0.0–0.1) |
||
| Children age 5–14 y | ||||||||
| Total | 62.8 | Referent NA | 150.6 | Referent NA | 25.0 | Referent NA | ||
| M | 63.3 | Referent | 153.4 | Referent | 25.6 | Referent | ||
| F |
62.5 |
1.0 (1.0–1.0) |
147.6 |
1.0 (0.9–1.0) |
23.7 |
0.9 (0.7–1.3) |
||
| Prioritized ethnicity | ||||||||
| Māori | 79.0 | 1.3 (1.3–1.4) | 248.7 | 3.4 (3.3–3.5) | 35.5 | 86.9 (11.9–635.0) | ||
| Pacific Islander | 99.6 | 1.7 (1.6–1.8) | 383.4 | 4.8 (4.7–5.0) | 98.3 | 240.4 (33.5–1,722.6) | ||
| Asian | 29.2 | 0.5 (0.5–0.5) | 41.0 | 0.6 (0.6–0.7) | 0.0 | 0.7 (0.0–18.0) | ||
| European/Other |
58.3 |
Referent |
66.9 |
Referent |
0.4 |
Referent |
||
| 2013 New Zealand Deprivation Index quintile | ||||||||
| 1 | 43.5 | Referent | 45.4 | Referent | 3.0 | Referent | ||
| 2 | 39.2 | 0.9 (0.8–1.0) | 45.6 | 1.0 (0.9–1.1) | 2.6 | 0.9 (0.2–3.8) | ||
| 3 | 50.0 | 1.1 (1.1–1.2) | 61.6 | 1.4 (1.3–1.4) | 6.5 | 2.1 (0.6–7.6) | ||
| 4 | 82.4 | 1.9 (1.7–2.0) | 125.7 | 2.7 (2.5–2.8) | 24.7 | 8.1 (2.8–23.7) | ||
| 5 |
103.1 |
2.3 (2.2–2.5) |
427.6 |
7.7 (7.4–8.1) |
76.9 |
25.2 (9.3–68.5) |
||
| Season | ||||||||
| Summer | 39.3 | Referent | 77.0 | Referent | 25.5 | Referent | ||
| Autumn | 62.3 | 1.6 (1.5–1.6) | 185.3 | 2.3 (2.3–2.4) | 32.6 | 1.3 (0.8–1.9) | ||
| Winter | 87.9 | 2.2 (2.2–2.3) | 201.7 | 2.5 (2.5–2.6) | 31.9 | 1.3 (0.9–1.8) | ||
| Spring |
62.1 |
1.6 (1.5–1.6) |
138.5 |
1.8 (1.7–1.8) |
8.5 |
0.3 (0.2–0.6) |
||
| District health board | ||||||||
| Waitemata | 54.4 | 1.0 (0.9–1.0) | 67.3 | 0.8 (0.8–0.9) | 13.4 | 0.6 (0.3–0.9) | ||
| Auckland | 54.9 | Referent | 80.1 | Referent | 24.1 | Referent | ||
| Countries Manukau | 72.1 | 1.3 (1.2–1.4) | 270.9 | 3.0 (2.9–3.1) | 36.8 | 1.5 (1.0–2.3) | ||
*ARF, acute rheumatic fever; GAS; group A Streptococcus; PHC, primary healthcare clinic; referent NA, referent not available; RR, relative risk.
†Per 1,000 person-years.
Page created: May 18, 2020
Page updated: May 18, 2020
Page reviewed: May 18, 2020
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