Table 2. Estimates of prevalence of knee osteoarthritis in New Zealand.
| Ethnicity | Sex | Age Range | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 40–44 | 45–49 | 50–54 | 55–59 | 60–64 | 65–69 | 70–74 | 75–79 | 80–84 | ||
| Non-Maori | Male | 1.19% | 4.82% | 4.79% | 6.27% | 6.30% | 11.40% | 11.44% | 12.75% | 12.85% |
| Female | 0.80% | 4.47% | 4.47% | 10.45% | 10.41% | 16.98% | 16.92% | 21.55% | 21.50% | |
| Maori | Male | 0.86% | 2.88% | 2.88% | 9.72% | 9.72% | 14.43% | 14.43% | 20.84% | 20.84% |
| Female | 1.29% | 4.83% | 4.83% | 6.98% | 6.98% | 13.10% | 13.10% | 18.34% | 18.34% | |
Note: Prevalence of OA was taken from the New Zealand Burden of Diseases, Injuries and Risk Factors Study (NZBD) study (Ministry of Health 2013), a partner to the GBD study (Murray, Vos et al. 2012, Cross, Smith et al. 2014). We used data from the 2012 United States (US) National Health Interview Survey (NHIS) to determine the proportion of people with knee OA as a proportion of the number of people with OA at any site (United States National Health Interview Survey 2012) and adjusted downward to account for self-report bias (March et al. 1998) (see S1 Appendix).