Figure 2 | Scientific Reports

Figure 2

From: Clustering and trajectories of key noncommunicable disease risk factors in Norway: the NCDNOR project

Figure 2

Selection of individuals from the different health studies into the study samples. Abbreviations: HUNT, The Trøndelag Health Study; CONOR, Cohort of Norway. aIncluding HUNT Sør-Trøndelag, bThe quality of the data collected after 1988 was reported to be poor. cCONOR includes data from HUNT2 and Tromsø4-Tromsø5. We excluded those from CONOR. d808,732 does not correspond to the sum of the numbers at the bottom of each health study, as individuals may have participated in several different studies. In addition, 181 individuals participated to several health studies < 1 year apart. These participations are not included in 1,197,158. eMissing information consists of 77.6% non-measured, non-response (20.7%) and manual cleaning decisions (1.7%).

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