Table 2.
Joinpoint regression analysis of anorexia nervosa prevalence rates by sex in China among individuals aged under 45 years (1992–2021).
| Category | Indicator | Interval | Change (%) | 95% CI |
|---|---|---|---|---|
| Overall | APC | 1992–1996 | 0.5651* | 0.4876 ~ 0.6432 |
| 1996–2000 | 2.1761* | 2.1057 ~ 2.2491 | ||
| 2000–2005 | 1.2096* | 1.1150 ~ 1.2811 | ||
| 2005–2013 | 1.7129* | 1.6719 ~ 1.7751 | ||
| 2013–2018 | 1.3550* | 1.2542 ~ 1.4347 | ||
| 2018–2021 | 0.4548* | 0.3319 ~ 0.5830 | ||
| AAPC | 1992–2021 | 1.3384* | 1.3271 ~ 1.3491 | |
| Male | APC | 1992–1996 | 0.4590* | 0.3897 ~ 0.5347 |
| 1996–2004 | 1.3574* | 1.3084 ~ 1.3923 | ||
| 2004–2018 | 1.6810* | 1.6653 ~ 1.7009 | ||
| 2018–2021 | 0.6262* | 0.5212 ~ 0.7126 | ||
| AAPC | 1992–2021 | 1.3130* | 1.3024 ~ 1.3233 | |
| Female | APC | 1992–1996 | 0.5957* | 0.4974 ~ 0.6957 |
| 1996–2000 | 2.5337* | 2.4462 ~ 2.6259 | ||
| 2000 ~ 2005 | 1.0581* | 0.9534 ~ 1.1451 | ||
| 2005 ~ 2014 | 1.7735* | 1.7319 ~ 1.8374 | ||
| 2014 ~ 2018 | 1.3751* | 1.1719 ~ 1.5303 | ||
| 2018 ~ 2021 | 0.5094* | 0.2940 ~ 0.7001 | ||
| AAPC | 1992 ~ 2021 | 1.4048* | 1.3902 ~ 1.4182 |
Annual percent change (APC) and average annual percent change (AAPC) are presented for each identified segment. *All APCs are statistically significant at P < 0.05.