When Does the Ecological Fallacy Vanish in Linear Regressions?

2017 ◽  
Author(s):  
Nils Herger
Keyword(s):  
Ecological Fallacy ◽  
Linear Regressions

Analisis Persepsi Korupsi Pajak Dan Iklim Organisasi Terhadap Kepatuhan Wajib Pajak Orang Pribadi Karyawan

2017 ◽  
Vol 4 (2) ◽  
pp. 169-180
Author(s):  
Arif Fajar Wibisono ◽  
Yudha Catur Kusuma N
Keyword(s):  
Organizational Climate ◽  
Tax Compliance ◽  
Quantitative Approach ◽  
Multiple Linear Regressions ◽  
Parametric Test ◽  
Tax Corruption ◽  
Linear Regressions

This study aims to determine whether perceptions of corruption and organizational climate affect the compliance of personal taxpayers. This explanatory study used quantitative approach of statistical parametric test and multiple linear regressions with questionnaire instrument. This study involved personal taxpayer in the area of KPP Pratama Kota Surakarta. The result of this study confirms that the perceptions of individual tax corruption and organizational climate affect the compliance of personal taxpayers. The better the organization’s climate in emphasizing tax compliance is, the higher the level of compliance personal taxpayers is. In addition, the higher the level of perception of a person’s corruption of the tax apparatus is severely punished then increasing the compliance of personal taxpayers’ increases.

Women's healthcare providers: Work factors, personality, and stress

2019 ◽  
Vol 47 (7) ◽  
pp. 1-11
Author(s):  
Victoria A. Farrow ◽  
Anthony Ahrens ◽  
Kathleen C. Gunthert ◽  
Jay Schulkin
Keyword(s):  
Cultural Differences ◽  
Perceived Stress ◽  
Healthcare Providers ◽  
Descriptive Statistics ◽  
Related Factors ◽  
Work Related ◽  
Work Factors ◽  
Physician Stress ◽  
Linear Regressions

We assessed neuroticism, perceived stress, and work-related factors among obstetrician-gynecologists (ob-gyns), and examined the relationships between these variables. Surveys were sent to 500 physician members of the American College of Obstetricians and Gynecologists and we received 287 (57.4%) completed responses. Analyses included descriptive statistics and linear regressions. Ob-gyns reported high levels of perceived stress. After controlling for neuroticism, variables that significantly predicted stress levels included average hours worked, perception of working too many hours, colleague support for work–home balance, isolation due to gender/cultural differences, and perception of workplace control. Because these work-related factors are linked to stress even when controlling for neuroticism, administrators and physicians may consider whether any of these factors are modifiable to mitigate physician stress. This in turn may affect physicians' own health and the quality of care patients receive.

scholarly journals Prospective study of dynamic whole-body 68Ga-DOTATOC-PET/CT acquisition in patients with well-differentiated neuroendocrine tumors

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Philippe Thuillier ◽  
David Bourhis ◽  
Jean Philippe Metges ◽  
Romain Le Pennec ◽  
Karim Amrane ◽  
...  
Keyword(s):  
Neuroendocrine Tumors ◽  
Linear Relation ◽  
Whole Body ◽  
Pet Ct ◽  
Non Linear ◽  
Well Differentiated ◽  
Analog Systems ◽  
Pet System ◽  
Dynamic Acquisition ◽  
Linear Regressions

AbstractTo present the feasibility of a dynamic whole-body (DWB) 68Ga-DOTATOC-PET/CT acquisition in patients with well-differentiated neuroendocrine tumors (WD-NETs). Sixty-one patients who underwent a DWB 68Ga-DOTATOC-PET/CT for a histologically proven/highly suspected WD-NET were prospectively included. The acquisition consisted in single-bed dynamic acquisition centered on the heart, followed by the DWB and static acquisitions. For liver, spleen and tumor (1–5/patient), Ki values (in ml/min/100 ml) were calculated according to Patlak's analysis and tumor-to-liver (TLR-Ki) and tumor-to-spleen ratios (TSR-Ki) were recorded. Ki-based parameters were compared to static parameters (SUVmax/SUVmean, TLR/TSRmean, according to liver/spleen SUVmean), in the whole-cohort and according to the PET system (analog/digital). A correlation analysis between SUVmean/Ki was performed using linear and non-linear regressions. Ki-liver was not influenced by the PET system used, unlike SUVmax/SUVmean. The regression analysis showed a non-linear relation between Ki/SUVmean (R2 = 0.55,0.68 and 0.71 for liver, spleen and tumor uptake, respectively) and a linear relation between TLRmean/TLR-Ki (R2 = 0.75). These results were not affected by the PET system, on the contrary of the relation between TSRmean/TSR-Ki (R2 = 0.94 and 0.73 using linear and non-linear regressions in digital and analog systems, respectively). Our study is the first showing the feasibility of a DWB 68Ga-DOTATOC-PET/CT acquisition in WD-NETs.

On the error of estimates from successive forest inventories with SPR

1987 ◽  
Vol 17 (5) ◽  
pp. 442-447
Author(s):  
Tiberius Cunia
Keyword(s):  
Forest Inventory ◽  
Random Sampling ◽  
Regression Coefficients ◽  
Partial Replacement ◽  
Forest Inventories ◽  
Continuous Forest ◽  
Regression Functions ◽  
The Given ◽  
Linear Regressions ◽  
Continuous Forest Inventory

The approach used by Cunia to combine the error from sample plots with the error from volume or biomass tables when Continuous Forest Inventory (CFI) estimates of current values and growth are calculated is extended to the CFI systems using Sampling with Partial Replacement (SPR). The formulae are derived for the case of SPR on two measurement occasions when (i) volume or biomass tables are constructed from linear regressions for which an estimate of the covariance matrix of the regression coefficients is known, and (ii) the sample plots or points are selected by random sampling independently of the given volume or biomass regression functions.

scholarly journals 218. Changes in Dental Antibiotic Prescribing in the United States, 2012–2017

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S111-S111
Author(s):  
Swetha Ramanathan ◽  
Connie H Yan ◽  
Colin Hubbard ◽  
Gregory Calip ◽  
Lisa K Sharp ◽  
...  
Keyword(s):  
The United States ◽  
Cross Sectional Study ◽  
Antibiotic Prescribing ◽  
Prescription Data ◽  
Oral Antibiotic ◽  
Sectional Study ◽  
Cross Sectional ◽  
Prescribing Trends ◽  
Adults And Children ◽  
Linear Regressions

Abstract Background Data suggest dental antibiotic prescribing is increasing with relatively less documented about prescribing trends in adults and children. Therefore, the aim was to evaluate trends in antibiotic prescribing by US dentists from 2012–2017. Methods This was a cross-sectional study of US dental prescribing using IQVIA Longitudinal Prescription Data from 2012 to 2017. Prescribing rates (prescriptions [Rx] per 100,000 dentists), mean days’ supply, and mean quantity dispensed were calculated monthly across eight oral antibiotic groups: amoxicillin, clindamycin, cephalexin, azithromycin, penicillin, doxycycline, fluoroquinolone, and other antibiotics. Descriptive frequencies and multiple linear regressions were performed to obtain trends overall and stratified by adults (≥ 18) and children (< 18). Results 220, 325 dentists prescribed 135 million Rx (94.0% in adults). 61.0% were amoxicillin, 14.4% clindamycin, 11.7% penicillin, 4.4% azithromycin, 4.3% cephalexin, 2.0% other antibiotics, 1.4% doxycycline, and 0.7% fluoroquinolones. Prescribing increased by 33 Rx/100,000 dentists (p< 0.0001) each month for all antibiotics. Amoxicillin (p< 0.0001) and clindamycin (p=0.02) prescribing rate increased by 73 and 5 Rx/100,000 dentists, respectively. Prescribing decreased by 8, 12, and 2 Rx/100,000 dentists for cephalexin (p< 0.0001), doxycycline (p< 0.0001), and fluoroquinolones (p=0.008), respectively. Mean days’ supply increased for amoxicillin, penicillin, and clindamycin (p< 0.0001), and decreased for cephalexin (p< 0.0001).Mean quantity dispensed decreased (p< 0.0001) for all groups except azithromycin and doxycycline. Among adults, cephalexin prescribing rates (7 Rx/100,000 dentist; p< 0.0001) and other antibiotics days’ supply (p< 0.0001) decreased. Among children, azithromycin prescribing rates (1 Rx/100,000 dentists, p=0.02), and fluoroquinolone and other antibiotics days’ supply (p< 0.0001) decreased. Conclusion These findings support dental antibiotic prescribing is increasing, specifically for amoxicillin and clindamycin. Further, trends differed between adults and children. Understanding what is driving these trends is important to target dental antibiotic stewardship efforts. Disclosures All Authors: No reported disclosures

scholarly journals Warranty Claim Quantity Forecasting via Multiple Linear Regressions

2021 ◽  
Vol 1962 (1) ◽  
pp. 012043
Author(s):  
N Haris ◽  
A K Junoh ◽  
W Z A Wan Muhamad
Keyword(s):  
Multiple Linear Regressions ◽  
Linear Regressions

scholarly journals Growing up after childhood cancer: maturity and life satisfaction in young adulthood

2021 ◽  
Author(s):  
Taylor M. Dattilo ◽  
Randal S. Olshefski ◽  
Leena Nahata ◽  
Jennifer A. Hansen-Moore ◽  
Cynthia A. Gerhardt ◽  
...  
Keyword(s):  
Life Satisfaction ◽  
Childhood Cancer ◽  
Satisfaction With Life ◽  
Adult Survivors ◽  
Well Being ◽  
Future Research ◽  
Growing Up ◽  
Young Adult Survivors ◽  
Survivors Of Childhood Cancer ◽  
Linear Regressions

Abstract Purpose Young individuals face a variety of developmental tasks as they mature into adulthood. For survivors of childhood cancer, growing up may be more difficult due to their illness and late effects from treatment. This study is the first to quantitatively examine perceptions of maturity and how these perceptions contribute to satisfaction with life among young adult survivors of childhood cancer. Methods Ninety survivors of childhood cancer (Mage = 29.8; 7–37 years post-diagnosis) were recruited to complete online surveys on how mature they felt relative to peers, their perceived maturity on three domains (financial, personal, social), and life satisfaction. Results Most survivors (62%; n = 56) felt they grew up faster than their peers, and over half (56%; n = 50) felt more mature. Perceived maturity was high on all three domains, but brain tumor survivors reported significantly lower maturity than other survivors (d = 0.76–1.11). All maturity domains were positively associated with life satisfaction (r = .49–.56). Hierarchical linear regressions indicated that 44% of the variance in life satisfaction was explained by perceptions of growing up slower (β =  − 1.08, p = .004) and marginally by greater perceived personal maturity (β = 0.45, p = .061). Conclusions Childhood cancer can influence development, with most survivors feeling that they grew up faster and were more mature than peers. Personal maturity was related to life satisfaction, with survivors of brain tumors or those who felt they grew up slower at greatest risk for lower life satisfaction. Future research and clinical practice should consider survivors’ development and maturation across the life span to promote overall well-being.

Knee Kinetics in Baseball Hitting and Return to Play After ACL Reconstruction

2020 ◽  
Author(s):  
Kevin Giordano ◽  
Meredith Chaput ◽  
Adam Anz ◽  
Jeremy Braziel ◽  
James Andrews ◽  
...  
Keyword(s):  
Acl Reconstruction ◽  
External Rotation ◽  
Tracking System ◽  
Return To Play ◽  
Knee Kinetics ◽  
System Data ◽  
Rehabilitation Exercises ◽  
Kinetics Of ◽  
Electromagnetic Tracking System ◽  
Linear Regressions

AbstractThe purpose of this study was to describe the knee kinetics of baseball hitting, develop a tool to predict knee kinetics from easily obtainable measures, and to compare knee kinetics to other exercises along the rehabilitation continuum to determine a timeline for when hitting may resume after ACL reconstruction. Nineteen high school baseball athletes (16.3±0.8 yrs, 180.6±5.7 cm, 78.4±10.8 kg) participated. Participants took ten swings off a tee. Kinetic data were recorded using an electromagnetic tracking system. Data from swings with the top three exit velocities were averaged for analysis. Linear regressions were used to determine if predictors of height, mass, age and exit velocity could predict the following torques: bilateral knee net, extension, internal and external rotation, valgus and varus torque; and anterior force. Backwards regression models revealed independent variables could significantly predict front knee net, internal and external rotation, extension, and varus torque, and anterior force; and back knee net and valgus torque. Based on the kinetics of baseball hitting compared to those of rehabilitation exercises, if the involved knee is the front, we suggest tee hitting may be initiated at 13 weeks after ACL reconstruction. If the involved knee is the back, we suggest tee hitting may initiated at 17 weeks after ACL reconstruction.

scholarly journals Age at Migration and Cognitive Health Among Chinese Older Immigrants in the United States

2021 ◽  
pp. 089826432110066
Author(s):  
Man Guo ◽  
Mengting Li ◽  
Hanzhang Xu ◽  
Meredith Stensland ◽  
Bei Wu ◽  
...  
Keyword(s):  
Cognitive Function ◽  
Social Engagement ◽  
The United States ◽  
Cognitive Health ◽  
Older Immigrants ◽  
Age At Migration ◽  
Lower Education ◽  
The Life Course ◽  
State Examination ◽  
Linear Regressions

Objectives: This study addressed two questions: (1) Is age at migration associated with cognitive function among Chinese older immigrants? and (2) what personal and environmental factors confound the above relationship? Methods: Data were derived from the Population Study of Chinese Elderly ( N = 2957). Quantile and linear regressions were used to examine the associations between age at migration and Mini-Mental State Examination (MMSE) and global cognitive function, respectively. Results: Migration in late middle age (50–64) or late adulthood (65 or older) was associated with lower MMSE scores. Global cognition did not vary by age at migration. Associations between age at migration and MMSE were stronger among individuals with lower education or social engagement. Discussion: Migrating late in one’s life has important implications for cognitive health over the life course. Findings are helpful to identify vulnerable older immigrant segments and provide tailored interventions to promote their cognitive health.

scholarly journals Effects of the COVID-19 Pandemic on Sports Entrepreneurship

2020 ◽  
Vol 12 (20) ◽  
pp. 8493
Author(s):  
Paloma Escamilla-Fajardo ◽  
Juan M. Núñez-Pomar ◽  
Ferran Calabuig-Moreno ◽  
Ana M. Gómez-Tafalla
Keyword(s):  
Service Quality ◽  
Risk Taking ◽  
Non Profit ◽  
Paired Sample ◽  
Sports Clubs ◽  
Before And After ◽  
The Impact ◽  
The Relationship ◽  
Linear Regressions ◽  
Crisis Situations

Sports entrepreneurship has been considered an important part of sports organisations when overcoming crisis situations. The aim of this study is to determine the impact of the crisis derived from COVID-19 on sports entrepreneurship and whether there are differences in the prediction of entrepreneurship on service quality in non-profit sports clubs. To this end, 145 sports clubs were analysed before and after the outbreak of the virus in society. Paired sample-t tests were carried out to determine the differences in variables studied before (Time I) and after (Time II) the COVID-19 outbreak, and correlations and hierarchical linear regressions were used to analyse the relationship between the variables studied in the two different stages. The results obtained show that risk-taking and innovation are significantly higher after the appearance of COVID-19, while proactivity has not undergone significant changes. Finally, the relationship between sports entrepreneurship and service quality is positive and significant in both stages but stronger before the crisis.

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