Overweight and obesity in adults (Indicator 14)
Published
The indicator describes the following: Prevalence of overweight and obesity in adults.
The indicator describes the following: Prevalence of overweight and obesity in adults.
This indicator is part of Target (7): Halt the rise in diabetes and obesity.
To find out the percentage with overweight and obesity, height and weight measurements of the general population must be taken. This is done in the Health Surveys in Tromsø and NordTrøndelag. Body mass index is used as a measure of overweight and obesity and is defined as weight/height^{2}. The threshold for overweight is a BMI of ≥ 25 kg/m^{2}. The threshold for obesity is a BMI of ≥ 30 kg/m^{2}.
Results
The prevalence of adults with overweight and obesity has increased between the mid1980s and 2016. This is explained by the fact that the proportion with obesity has increased while the proportion with overweight appears to be more stable. This is shown by the height and weight measurements taken from the population in Tromsø and Nord Trøndelag.
Figure 1: Proportion of men aged 4079 with overweight and obesity in Tromsø, as a percentage, agestandardised. Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Source: Tromsø Study. See Table 1 below.
Figure 2: Proportion of women aged 4079 with overweight and obesity in Tromsø, as a percentage, agestandardised. Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Source: Tromsø Study. See Table 2 below.
Figure 3: Proportion of men aged 20 and older with overweight and obesity in Nord Trøndelag, as a percentage, agestandardised. Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Source: Health Survey in Nord Trøndelag (HUNT). See Table 3 below.
Figure 4: Proportion of women aged 20 and older with overweight and obesity in Nord Trøndelag, as a percentage, agestandardised. Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Source: Health Survey in Nord Trøndelag (HUNT). See Table 4 below.
Data sources
The data sources for this indicator are the Tromsø Study and HUNT.
A description and definitions follow below.
Data source: Tromsø Study
Description
The Tromsø Study started in 1974 and consists of repeated health checks on Tromsø municipality’s population. The last two studies are particularly relevant to the period WHO would like Member States to report on: 20102025. Tromsø 6 (20072008) included almost 13 000 adults between the ages of 30 and 87, and had an attendance rate of 63 per cent. Tromsø 7 (20152016) included more than 21 000 adults aged 40 and older, and had an attendance rate of 65 per cent.
Effect measure
 The prevalence of overweight within 10year age groups of men and women, as a percentage.
 The prevalence of obesity within 10year age groups of men and women, as a percentage.
Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Body mass index is defined as:
weight in kilograms / (height in metres)^{2}.
The data are agestandardised to the age distribution of the Norwegian population as of 1 January 2000.
Interpretation and sources of error
The proportion of individuals attending health checks has gradually declined over time. The figures and tables we present do not include any assessment of the implications of changes in the attendance rate.
Data source: Health Survey in Nord Trøndelag (HUNT)
Description
The Health Survey in Nord Trøndelag (HUNT) began with HUNT1 in 198486 and consists of repeated health checks performed on the population of Nord Trøndelag county. The last two studies are particularly relevant to the period WHO would like Member States to report on: 20102025. HUNT2 (199597) covered over 65,000 individuals aged 20 and older and had an attendance rate of 70 per cent. HUNT3 (200608) covered over 51000 individuals aged 20 and older and had an attendance rate of 54 per cent. HUNT4 is being conducted between 2017 and 2019 and will contribute new data.
Effect measure
 Prevalence of overweight among men and women aged 20 and older, as a percentage.
 Prevalence of obesity among men and women aged 20 and older, as a percentage.
Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Body mass index is calculated based on:
weight in kilograms / (height in metres)^{2}.^{ }
The data are agestandardised to the age distribution of the Norwegian population as of 1 January 2000.
Interpretation and sources of error
The proportion of individuals attending health checks has gradually declined over time. The figures and tables we present do not include any assessment of the possible implications of changes in the attendance rate.
Tables accompanying the figures

2007–08 
2015–16 
Overweight 
51.2 
50.8 
Obesity 
20.2 
25.5 
Overweight and obesity 
71.4 
76.3 
Table 1: Proportion of men aged 4079 with overweight and obesity in Tromsø, as a percentage, agestandardised. Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Source: Tromsø Study.

2007–08 
2015–16 
Overweight 
38.0 
37.0 
Obesity 
19.5 
23.0 
Overweight and obesity 
57.5 
60.0 
Table 2: Proportion of women aged 4079 with overweight and obesity in Tromsø, as a percentage, agestandardised. Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Source: Tromsø Study.

1984–86 
1995–97 
2006–08 
Overweight 
41.4 
49.5 
49.9 
Obesity 
7.5 
13.8 
21.1 
Overweight and obesity 
48.9 
63.3 
71.0 
Table 3: Proportion of men aged 20 and older with overweight and obesity in Nord Trøndelag, as a percentage, agestandardised. Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Source: Health Survey in Nord Trøndelag (HUNT).

1984–86 
1995–97 
2006–08 
Overweight 
29.0 
36.3 
35.7 
Obesity 
12.5 
17.7 
22.0 
Overweight and obesity 
41.5 
54.0 
57.7 
Table 4: Proportion of women aged 20 and older with overweight and obesity in Nord Trøndelag, as a percentage, agestandardised. Overweight is defined as a BMI of ≥ 25 kg/m^{2}. Obesity is defined as a BMI of ≥ 30 kg/m^{2}. Source: Health Survey in Nord Trøndelag (HUNT).
Global indicator definition
WHO’s definition of the indicator
Indicator 14. Agestandardised prevalence of overweight and obesity among persons aged 18+ years.
Authors and contacts
Text compiled by the Department of NonCommunicable Diseases at the Norwegian Institute of Public Health in collaboration with the Tromsø Study at the University of Tromsø, the Health Survey in Nord Trøndelag (HUNT) at the Norwegian University of Science and Technology (NTNU).