scholarly journals Multiple imputation of completely missing repeated measures data within person from a complex sample: application to accelerometer data in the National Health and Nutrition Examination Survey

2016 ◽  
Vol 35 (28) ◽  
pp. 5170-5188 ◽  
Author(s):  
Benmei Liu ◽  
Mandi Yu ◽  
Barry I. Graubard ◽  
Richard P. Troiano ◽  
Nathaniel Schenker
Keyword(s):  
Multiple Imputation ◽  
National Health ◽  
Repeated Measures ◽  
Accelerometer Data ◽  
Nutrition Examination Survey ◽  
Health And Nutrition ◽  
Repeated Measures Data ◽  
Complex Sample ◽  
Sample Application

scholarly journals Measurement Considerations of Peak Stepping Cadence Measures Using National Health and Nutrition Examination Survey 2005–2006

2016 ◽  
Vol 13 (1) ◽  
pp. 44-52 ◽  
Author(s):  
Minsoo Kang ◽  
Youngdeok Kim ◽  
David A. Rowe
Keyword(s):  
Older Adults ◽  
National Health ◽  
Simulation Analysis ◽  
Optimal Number ◽  
Future Research ◽  
Accelerometer Data ◽  
Nutrition Examination Survey ◽  
Middle Aged ◽  
Health And Nutrition ◽  
Middle Aged Adults

Background:This study examined the optimal measurement conditions to obtain reliable peak cadence measures using the accelerometer-determined step data from the National Health and Nutrition Examination Survey 2005–2006.Methods:A total of 1282 adults (> 17 years) who provided valid accelerometer data for 7 consecutive days were included. The peak 1- and 30-minute cadences were extracted. The sources of variance in peak stepping cadences were estimated using Generalizability theory analysis. A simulation analysis was conducted to examine the effect of the inclusion of weekend days. The optimal number of monitoring days to achieve 80% reliability for peak stepping cadences were estimated.Results:Intraindividual variability was the largest variance component of peak cadences for young and middle-aged adults aged < 60 years (50.55%–59.24%) compared with older adults aged ≥ 60 years (31.62%–41.72%). In general, the minimum of 7 and 5 days of monitoring were required for peak 1- and 30-minute cadences among young and middle-aged adults, respectively, whereas 3 days of monitoring was sufficient for older adults to achieve the desired reliability (0.80). The inclusion of weekend days in the monitoring frame may not be practically important.Conclusions:The findings could be applied in future research as the reference measurement conditions for peak cadences.

scholarly journals Relationship between urinary cotinine and serum vitamin A levels in Korean adults: the Korea National Health and Nutrition Examination Survey (KNHANES), 2016–2018

2021 ◽  
Vol 49 (5) ◽  
pp. 030006052110167
Author(s):  
Soo Hyun Cho
Keyword(s):  
Vitamin A ◽  
National Health ◽  
Linear Models ◽  
Serum Vitamin ◽  
Nutrition Examination Survey ◽  
Urinary Cotinine ◽  
Korean Adults ◽  
Health And Nutrition ◽  
Complex Sample ◽  
The Relationship

Objective To examine the relationship between urinary cotinine and serum vitamin A levels in Korean adults. Methods A total of 4445 adults (age ≥19 years) participating in the Korea National Health and Nutrition Examination Survey (KNHANES) from 2016 to 2018 were classified by sex and as smokers/electronic cigarette users (SE) or non-smokers (NS). Data were analyzed using complex sample general linear models. Results There were no differences in dietary intake of vitamin A, carotene, or retinol between the SE and NS groups. Adjusted mean serum vitamin A levels were higher in the SE group compared with those in the NS group (0.63 mg/L vs 0.60 mg/L among men; 0.55 mg/L vs 0.51 mg/L among women). Among all participants, urinary cotinine and serum vitamin A levels were positively correlated (R2 = 0.037). However, no correlation was observed in either the SE or NS groups individually. In a model adjusted for age, body mass index, sex, frequency of binge drinking, and dyslipidemia, a stronger correlation was observed (R2 = 0.244). Conclusion In Korean adults, urinary cotinine levels were positively associated with serum vitamin A levels. Mean serum vitamin A levels were significantly higher in the SE group compared with the NS group.

Multiple imputation of missing dual-energy X-ray absorptiometry data in the National Health and Nutrition Examination Survey

2010 ◽  
Vol 30 (3) ◽  
pp. 260-276 ◽  
Author(s):  
Nathaniel Schenker ◽  
Lori G. Borrud ◽  
Vicki L. Burt ◽  
Lester R. Curtin ◽  
Katherine M. Flegal ◽  
...  
Keyword(s):  
Multiple Imputation ◽  
National Health ◽  
Dual Energy ◽  
Nutrition Examination Survey ◽  
X Ray ◽  
Health And Nutrition

scholarly journals Normative Peak 30-Min Cadence (Steps per Minute) Values for Older Adults: NHANES 2005–2006

2019 ◽  
Vol 27 (5) ◽  
pp. 625-632
Author(s):  
Elroy J. Aguiar ◽  
John M. Schuna ◽  
Tiago V. Barreira ◽  
Emily F. Mire ◽  
Stephanie T. Broyles ◽  
...  
Keyword(s):  
Older Adults ◽  
National Health ◽  
Age Groups ◽  
Normative Values ◽  
Accelerometer Data ◽  
Nutrition Examination Survey ◽  
Free Living ◽  
Best Effort ◽  
Health And Nutrition ◽  
Lms Method

Walking cadence (steps per minute) is associated with the intensity of ambulatory behavior. This analysis provides normative values for peak 30-min cadence, an indicator of “natural best effort” during free-living behavior. A sample of 1,196 older adults (aged from 60 to 85+) with accelerometer data from the National Health and Nutrition Examination Survey 2005–2006 was used. Peak 30-min cadence was calculated for each individual. Quintile-defined values were computed, stratified by sex and age groups. Smoothed sex-specific centile curves across the age span were fitted using the LMS method. Peak 30-min cadence generally trended lower as age increased. The uppermost quintile value was >85 steps/min (men: 60–64 years), and the lowermost quintile value was <22 steps/min (women: 85+). The highest 95th centile value was 103 steps/min (men: 64–70 years), and the lowest 5th centile value was 15 steps/min (women: 85+). These normative values may be useful for evaluating older adults’ “natural best effort” during free-living ambulatory behavior.

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