Table 1 Joinpoint analysis of trends in the incidence rates for oral, oropharyngeal, hypopharyngeal, laryngeal cancer in males, Taiwan 1980–2019

AAPC (95% CI)

1980–2019

5.1% (4.4, 5.8)

5.7% (4.0, 7.5)

5.1% (4.7, 5.5)

1.2% (0.7, 1.6)

Trend 1, APC (95%)

1980–1982, − 6.2% (− 16.5, 5.4)

1980–1982, − 9.8% (− 21.3, 3.4)

1980–2008, 7.0% (6.7, 7.3) **

1980–2002, 2.1% (1.5, 2.7) **

Trend 2, APC (95%)

1982–1999, 10.1% (9.6, 10.6)**

1982–1985, 13.6% (− 0.9, 30.3)

2008–2019, 0.4% (−0.8, 1.5)

2002–2019, 0.0% (− 0.8, 0.8)

Trend 3, APC (95%)

1999–2009, 4.5% (3.4, 5.6)**

1985–1988, −1.2% (− 13.8, 13.2)

Trend 4, APC (95%)

2009–2019, − 0.1% (− 1.0, 0.8)

1988–1999, 11.9% (10.7, 13.1)**

Trend 5, APC (95%)

1999–2009, 7.3% (5.9, 8.6)**

Trend 6, APC (95%)

2009–2019, 1.0% (0.0, 2.1)