A Dynamic Estimation of Obesity Using Nhanes Data: A Pseudo‐Panel Approach

Background A nationwide ban on family/replacement donation (FRD) went into effect on April 1, 2018 in China. To date, no reports relevant to the trend of plateletpheresis donations before and after a nationwide ban on FRD were found. Methods We used two independent full samples, consisting of 135,851 and 82,129 plateletpheresis donors from Guangzhou and Chengdu between October 2012 and September 2019, respectively. A pseudo-panel data approach was applied by grouping three time-invariant covariates – gender, blood donation history, and birth year across 14 cross-sections (a 6-month interval each) to form a total of 24 cohort groups (14 × 24 = 336 cohorts, i.e., cells) with each having common covariates. The outcome was average apheresis platelet units per donor in each cell. We performed a two-piecewise linear mixed model with the cross-section (i.e., time) just right before the ban as a time breakpoint (i.e., 11th cross-section) to examine the trend of outcome with the adjustment of three time-invariant covariates. We removed the FRDs in each of the first 11 cross-sections to detect its possible influence on the trend. Results The final model for the samples from Guangzhou presented a two-piecewise linear trend of the outcome over time with a horizontal line to the left of the breakpoint (βtimeBefore11 = 0.0111, p = 0.0976) and a significantly positive linear trend to the right (βtimeAfter11 = 0.0404, p < 0.0001). The male donors and the donors with plateletpheresis donation history had an increased baseline outcome and a significant outcome change over time after the ban. Such a two-piecewise linear trend pattern can be replicated using the samples from Chengdu with some minor variations. Removing the FRD before the ban can change the pattern. Conclusion The significant increase of the average apheresis platelet units per donor over time after the FRD ban may be related to the implement of the FRD ban and the improved donation behavior of male donors and/or donors with platelet donation history after the ban. Our findings may potentially motivate the policymakers in other countries where the FRD for plateletpheresis donation is still legitimate to phase out their FRD strategy and ultimately achieve 100% voluntary plateletpheresis donation.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Our study was actually an observational study using pseudo-panel approach to analysis the data [ 13 – 15 ]. Thus, we used the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) (Additional file 1 ) statement to ensure standardization and enhance the quality of the reporting [ 18 ].…”

Section: Methodsmentioning

confidence: 99%

The apheresis platelet donation was increased after a nationwide ban on family/replacement donation in China

Chen

Zhou

Fu³

et al. 2021

BMC Public Health

View full text Add to dashboard Cite

show abstract

“…The pseudo-panel data approach is actually a solution to transform the individual-level cross-sectional data into the group-level data (i.e., pseudo-panel data)such that the typical longitudinal models can be applied to e ciently and consistently estimate the change of the interested outcome variable over time. [13] This approach has been increasingly applied to public health [14,15] . According to the methods described in the literature [16,17], we constructed two pseudo-panel datasets from our discovery and replicate data by grouping three time-invariant variables -gender, birth year, and blood donation history.…”

Section: Construction Of Pseudo-panel Datasetsmentioning

confidence: 99%

“…Our study was actually an observational study using pseudo-panel approach to analysis the data [13][14][15]. Thus, we used the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) statement to ensure standardisation and enhance the quality of the reporting [18].…”

Section: Construction Of Pseudo-panel Datasetsmentioning

confidence: 99%

Plateletpheresis Donation Trend and a Ban on Family/Replacement Donation in China: A Pseudo-Panel Data Approach Analysis

Chen

Zhou

Fu³

et al. 2020

Preprint

View full text Add to dashboard Cite

Background A nationwide ban on family/replacement donation (FRD) went into effect on April 1, 2018 in China. To date, no reports relevant to the trend of plateletpheresis donations before and after a nationwide ban on FRD were found.Methods We used two independent full samples, consisting of 135851 and 82129plateletpheresis donors from Guangzhou and Chengdu between October 2012 and September 2019, respectively. A pseudo-panel dataset approach was applied by grouping three time-invariant covariates – gender, blood donation history, and birth year across 14 cross-sections (a 6-month interval each)to form a total of 24 cohort groups (14×24=336 cohorts, i.e., cells) with each having common covariates. The outcome was average apheresis platelet units per donor in each cell. We performed a two-piecewise linear mixed model with the cross-section (i.e., time) just right before the ban as a time breakpoint(i.e., 11th cross-section) to examine the trend of outcome with the adjustment of three time-invariant covariates. We removed the family/replacement donations in each of the first 11 cross-sections to detect its possible influence on the trend.Results The final model for the samples from Guangzhou presented a two-piecewise linear trend of the outcome over time with a horizontal line to the left of the breakpoint (βtimeBefore11=0.0111,p=0.0976) and a significantly positive linear trend to the right (βtimeAfter11=0.0404,p<0.0001). The male donors and the donors with plateletpheresis donation history had an increased baseline outcome and a significant outcome change over time after the ban. Such a two-piecewise linear trend pattern can be replicated using the samples from Chengdu with some minor variations. Removing the FRD before the ban can change the pattern.Conclusion The significant increase of the average apheresis platelet units per donor over time after the FRD ban may be related to the implement of the FRD ban and the improved donation behavior of male donors and/or donors with platelet donation history after the ban. Our findings may potentially motivate the policymakers in other countries where the FRD for plateletpheresis donation is still legitimate to phase out their FRD strategy and ultimately achieve 100% voluntary plateletpheresis donation.

show abstract

“…The key input that panel data provide for these models is a set of health and mortality transition probabilities representative of the population at large (Chen et al, 2016). Panel datasets are preferred for modeling highly complex processes in human aging (Saksena & Maldonado, 2017) because they provide data on the dynamics of individual transitions. Longitudinal datasets enable us to disentangle age, cohort, and period effects and help control for unobserved heterogeneity (Roßmann & Gummer, 2016).…”

Section: Introductionmentioning

confidence: 99%

Future projection of the health and functional status of older people in Japan: A multistate transition microsimulation model with repeated cross‐sectional data

et al. 2020

View full text Add to dashboard Cite

Accurate future projections of population health are imperative to plan for the future healthcare needs of a rapidly aging population. Multistate-transition microsimulation models, such as the U.S. Future Elderly Model, address this need but require high-quality panel data for calibration. We develop an alternative method that relaxes this data requirement, using repeated crosssectional representative surveys to estimate multistate-transition contingency tables applied to Japan's population. We calculate the birth cohort sex-specific prevalence of comorbidities using five waves of the governmental health surveys. Combining estimated comorbidity prevalence with death record information, we determine the transition probabilities of health statuses. We then construct a virtual Japanese population aged 60 and older as of 2013 and perform a microsimulation to project disease distributions to 2046. Our estimates replicate governmental projections of population pyramids and match the actual prevalence trends of comorbidities and the disease incidence rates reported in epidemiological studies in the past decade. Our future projections of cardiovascular diseases indicate lower prevalence than expected from static models, reflecting recent declining trends in disease incidence and fatality. K E Y W O R D Sdemographic trends, economics of the elderly, forecasting models, health and economic development, simulation methods

show abstract

A Dynamic Estimation of Obesity Using Nhanes Data: A Pseudo‐Panel Approach

Cited by 4 publications

References 54 publications

The apheresis platelet donation was increased after a nationwide ban on family/replacement donation in China

The apheresis platelet donation was increased after a nationwide ban on family/replacement donation in China

Plateletpheresis Donation Trend and a Ban on Family/Replacement Donation in China: A Pseudo-Panel Data Approach Analysis

Future projection of the health and functional status of older people in Japan: A multistate transition microsimulation model with repeated cross‐sectional data

Contact Info

Product

Resources

About