Differential incidence trends of colon and rectal cancers in Hong Kong: an age-period-cohort analysis

Cancer Communications

Table 1 Joinpoint analyses of colon and rectal cancer incidence by sex and age, 1983–2012, Hong Kong

Sex	Anatomic sites	Age	Calendar period	Average APC (95% CI)
Male	Colon cancer	All 20+	1983–1995	1.16 (0.88, 1.44)
			1995–2012	− 0.42 (− 0.54, − 0.30)
			Full Period	0.05 (− 0.02, 0.13)
		20–49	1983–2012	− 1.11 (− 1.32, − 0.90)
		50+	1983–1996	1.40 (1.16, 1.64)
			1996–2012	− 0.44 (− 0.57, − 0.31)
			Full Period	0.21 (0.13, 0.29)
	Rectal cancer	All 20+	1983–2012	1.35 (1.23, 1.46)
		20–49	1983–2012	0.60 (0.37, 0.84)
		50+	1983–2012	1.45 (1.32, 1.58)
Female	Colon cancer	All 20+	1983–1992	2.24 (1.68, 2.79)
			1992–2012	− 0.91 (− 1.04, − 0.79)
			Full period	− 0.33 (− 0.43, − 0.23)
		20–49	1983–2012	− 1.56 (− 1.73, − 1.39)
		50+	1983–1992	2.57 (2.04, 3.11)
			1992–2012	− 0.78 (− 0.91, − 0.66)
			Full period	− 0.12 (− 0.23, − 0.01)
	Rectal cancer	All 20+	1983–2012	0.23 (0.13, 0.33)
		20–49	1983–2012	− 0.17 (− 0.40, 0.05)
		50+	1983–2012	0.29 (0.19, 0.39)

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