Table 6.

Mean waist circumference in Tromsø 6 (2007–2008), Tromsø 7 (2015–2016) and change in waist circumference

Age 2007, years	N	Tromsø 6 (2007–2008)		Tromsø 7 (2015–2016)		Change between Tromsø 6 and Tromsø 7
		Mean, cm	SD	Mean, cm	SD	Mean, cm	95% CI*
Women
35–39	118	89.3	12.8	89.8	13.1	0.5	−1.2 to 2.1
40–44	917	88.1	11.7	89.9	12.9	1.8	1.3 to 2.4
45–49	484	90.2	12.8	91.9	13.2	1.8	1.0 to 2.5
50–54	523	88.4	10.6	90.0	11.3	1.6	0.9 to 2.2
55–59	482	90.5	12.1	91.6	12.7	1.1	0.4 to 1.7
60–64	943	92.8	11.8	94.0	12.7	1.1	0.7 to 1.6
65–69	568	92.0	11.3	93.0	12.0	1.0	0.4 to 1.6
70–74	302	91.8	12.1	92.1	12.3	0.4	−0.5 to 1.3
75–79	169	92.8	11.3	92.6	12.4	−0.2	−1.4 to 1.0
All women	4506	90.5	11.9	91.8	12.6	1.3	1.0 to 1.5
Men
35–39	86	98.8	10.1	100.7	12.5	1.8	0.5 to 3.2
40–44	738	97.5	10.4	99.3	11.8	1.8	1.2 to 2.3
45–49	417	97.2	10.0	99.8	10.9	2.6	1.9 to 3.2
50–54	404	98.6	10.2	100.0	11.1	1.4	0.8 to 2.1
55–59	460	99.4	10.4	100.9	11.2	1.5	0.9 to 2.1
60–64	836	100.8	10.2	102.1	10.6	1.3	0.8 to 1.7
65–69	571	100.8	9.8	101.6	11.0	0.9	0.3 to 1.4
70–74	295	100.0	9.9	100.5	9.9	0.5	−0.2 to 1.2
75–79	109	99.9	9.9	100.6	10.1	0.7	−0.6 to 1.9
All men	3916	99.3	10.2	100.7	11.1	1.4	1.2 to 1.6

The Tromsø study

*CI based on the paired t-statistic.