Regional differences in cervical cancer incidence and associated risk behaviors among Norwegian women: a population-based study

Table 2 Cervical cancer incidence trend analyses by region and histology in Norway during 1992–2016

Histology	Region	AAPC¹ (95% CI²)	Joinpoint³	Subperiod	APC⁴ (95% CI)
All cancer	North	-1.0 (−1.2, −0.7)*	None
	Middle	−0.3 (−1.0, 0.4)	2002	1992–2002	−5.4 (−6.6, −4.1)*
	Middle			2002–2016	3.4 (2.6, 4.2)*
	Southeast	−0.7 (−1.0, − 0.3)*	2007	1992–2007	−2.8 (−3.1, −2.4)*
	Southeast			2007–2016	2.9 (2.1, 3.7)*
	West	−0.3 (− 0.6, 0.0)	None
SCC⁵	North	−1.9 (−2.3, − 1.5)*	None
	Middle	−0.5 (−1.4, 0.4)	2003	1992–2003	−6.4 (−7.8, −5.1)*
	Middle			2003–2016	4.9 (3.6, 6.1)*
	Southeast	−1.2 (−1.6, −0.9)*	2006	1992–2006	−3.4 (−3.8, − 3.1)*
	Southeast			2006–2016	1.9 (1.3, 2.6)*
	West	−0.4 (−0.8, − 0.1)*	None
ADC⁶	North	3.5 (2.7, 4.4)*	None
	Middle	1.7 (1.1, 2.4)*	None
	Southeast	1.4 (1.0, 1.8)*	None
	West	0.3 (−0.3, 0.9)	None

¹ Average annual percentage trend from 1992 to 2016
² Confidence interval
³ Whether/when (calendar year) trend changed, from joinpoint regression analysis
⁴ Annual percentage change for subperiod with distinct incidence trend
⁵ Squamous cell cancer
⁶ Adenocarcinoma
* P < 0.05

ISSN: 1471-2407