Weighted Estimates
The estimated percentages reported above have been produced by weighting the sample so that the results better represent the New Jersey population and to adjust for the probability of selection. The sample sizes reported in the table are unweighted. Estimates calculated using the unweighted sample sizes will not be accurate. Denominator
Unless otherwise indicated, the denominator used for the calculation of these estimates includes all survey respondents except those with missing, don't know, and refused answers. (If the query was limited to a particular sub-population-group, only those respondents are included in the denominator.)

Question Wording
1. About how much do you weigh without shoes?
2. About how tall are you without shoes?
*Body Mass Index (BMI) is defined as body weight (in kilograms) divided by heights squared (in meters) based on the responses to the above questions.
"Obese" is defined as a BMI 30 or more.

Related Health Indicators and Objectives

Healthy New Jersey/Healthy People Objective(s):
Reduce the proportion of the population that is obese [Aged 18 years and older] (HNJ 2020 Obj. NF-1a)
Reduce the proportion of adults who are obese (HP 2020 Obj. NWS-9)
Adults who are obese (HP 2020 Leading Health Indicator)
Reduce percentage of persons aged 18+ who are obese (HNJ 2010 Obj. 3D-3)
Reduce the proportion of adults who are obese (HP 2010 Obj. 19-2)

Other Health Indicators and Objectives:
Obesity among adults aged >= 18 years (CDC/CSTE Chronic Disease Indicator)

SHAD Health Indicator Profile(s):
Obesity Among Adults Ages 18+

Survey Sample
The New Jersey Behavioral Risk Factor Survey is a survey of non-institutionalized New Jersey adults aged 18 and over conducted using scientific telephone survey methods. Excluded are adults living in group quarters such as college dormitories, nursing homes, military barracks, and prisons. (Individuals who cannot conduct the interview in English or Spanish have also been excluded from the survey since it began in 1991, and cell phone interviewing did not begin until 2011.) Statistical Reliability
The margin of error (MOE) is calculated as the standard error of the estimate multiplied by 1.96. A MOE of 3 percentage points or less is commonly used as a standard of reliability for opinion surveys, although the reliability of a measure should ideally be assessed in conjunction with the specific use to which it will be put.

The relative standard error (RSE) also provides a measure of reliability for statistical estimates. The RSE is computed by dividing the standard error of the estimate by the estimate itself (or its complement, if the estimate itself is a proportion greater than 0.5) and multiplying by 100 to convert it to a percentage. (Estimates with a RSE above 25%-30% are commonly flagged as "unreliable" for government surveys, although the reliability of a measure should ideally be assessed in conjunction with the specific use to which it will be put.) 2018 Data
The NJBRFS query module contains incomplete data for 2018; data for the NJBRFS project were collected from January to March and October to November only and by two different survey companies. Additionally, supplemental data were received from other state BRFSS programs which conducted interviews throughout the year among New Jersey residents as part of a reciprocity agreement. Although the data meet minimum requirements to be included in the national BRFSS public-use data set, please consider the differences in collection when comparing estimates across years.