scholarly journals On Multivariate Median Regression

Bernoulli ◽  
1999 ◽  
Vol 5 (4) ◽  
pp. 683 ◽  
Author(s):  
Biman Chakraborty
Keyword(s):  
Median Regression ◽  
Multivariate Median

scholarly journals Tenofovir Disoproxil Fumarate Is Associated with a Set-Point Variation in the Calcium-Parathyroid Hormone-Vitamin D Axis: Results from a German Cohort

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Sebastian Noe ◽  
Silke Heldwein ◽  
Carmen Wiese ◽  
Rita Pascucci ◽  
Ariane von Krosigk ◽  
...  
Keyword(s):  
Vitamin D ◽  
Parathyroid Hormone ◽  
Antiretroviral Therapy ◽  
Tenofovir Disoproxil Fumarate ◽  
Categorical Variables ◽  
People Living With Hiv ◽  
Median Regression ◽  
Multivariate Median ◽  
General Populations ◽  
Living With Hiv

Background. Higher levels of parathyroid hormone have been associated with the use of tenofovir disoproxil fumarate (TDF) in people with and without HIV infection. Yet, alterations in calcium levels have never been elucidated in detail. Objective. To compare the association of parathyroid hormone with serum calcium levels and other markers of calcium and bone metabolism in people living with HIV on TDF- and non-TDF-containing antiretroviral therapy. Patients and Methods. A retrospective single center cohort study in Munich, Germany. Median and interquartile ranges and absolute and relative frequencies were used to describe continuous and categorical variables, respectively. The Mann–Whitney U test and chi2-test were used for comparisons. Multivariate median regression was performed in a stepwise backward approach. Results. 1,002 patients were included (786 (78.4%) male; median age 48 (40–55) years). 564 patients (56.3%) had a TDF-containing ART regimen. PTH concentrations were 46.9 (33.0–64.7) pg/mL and 35.2 (26.4–55.4) pg/mL (P=0.001), 43.3 (30.8–59.8) pg/mL and 31.8 (22.3–49.6) pg/mL (P<0.001), 46.1 (29.5–65.4) pg/mL and 33.4 (22.6–50.1) pg/mL (P<0.001), and 37.8 (25.3–57.9) pg/mL and 33.8 (20.1–45.3) pg/mL (P=0.012) within the first, second, third, and fourth quartile of corrected calcium levels for patients with and without TDF-containing ART, respectively. In multivariate median regression, PTH concentration was significantly associated with Cacorr. (−32.2 (−49.8 to −14.8); P<0.001), female sex (5.2 (1.2–9.2); P=0.010), 25(OH)D (−0.4 (−0.5 to −0.3); P<0.001), and TDF-use (9.2 (6.0–12.5); P<0.001). Discussion. Higher levels of PTH seem to be needed to maintain normal calcium levels in PLWH on TDF-containing ART compared to non-TDF-containing ART. Optimal concentrations for 25-hydroxy vitamin D and calcium might therefore be different in people using TDF than expected from general populations but also people living with HIV with non-TDF-containing antiretroviral therapy. This might require different supplementation strategies but warrants further investigation.

scholarly journals Skew-normal median regression model with applications

2020 ◽  
Vol 1616 ◽  
pp. 012079
Author(s):  
Xingyun Cao ◽  
Gege Wang ◽  
Liucang Wu
Keyword(s):  
Regression Model ◽  
Median Regression ◽  
Skew Normal

scholarly journals Monotone Median Regression

1972 ◽  
Vol 43 (5) ◽  
pp. 1459-1469 ◽  
Author(s):  
J. D. Cryer ◽  
Tim Robertson ◽  
F. T. Wright ◽  
Robert J. Casady
Keyword(s):  
Median Regression

scholarly journals Correlates of sugar-sweetened beverage intake among low-income women during the first 1000 days

2020 ◽  
pp. 1-6
Author(s):  
Erika R Cheng ◽  
Elizabeth Batista ◽  
Ling Chen ◽  
Kelsey Nichols ◽  
Sohyun Park ◽  
...  
Keyword(s):  
New York ◽  
New York City ◽  
Low Income ◽  
Postpartum Women ◽  
Median Regression ◽  
Cross Sectional ◽  
Sugar Sweetened Beverage ◽  
Sweetened Beverage ◽  
Sweetened Beverages ◽  
Supplemental Nutrition Program

Abstract Objective: To describe prenatal and postpartum consumption of water, cows’ milk, 100 % juice and sugar-sweetened beverages (SSB) among women enrolled in the Special Supplemental Nutrition Program for Women, Infants and Children (WIC) programme in New York City (NYC) and to identify correlates of SSB intake in this population. Design: Cross-sectional data were collected from structured questionnaires that included validated beverage frequency questionnaires with the assistance of container samples. The association of maternal and household factors and non-SSB consumption with habitual daily energetic (kJ (kcal)) intake from SSB was assessed by using multivariable median regression. Setting: WIC programme in NYC, NY. Data were collected in 2017. Participants: 388 pregnant or postpartum women (infant aged <2 years) from the NYC First 1000 Days Study. Results: Median age was 28 years (interquartile range (IQR) 24–34); 94·1 % were Hispanic/Latina, and 31·4 % were pregnant. Overall, 87·7 % of pregnant and 89·1% of postpartum women consumed SSB ≥ once weekly, contributing to a median daily energetic intake of 410 kJ (98 kcal) (IQR (113–904 kJ) 27–216) and 464 kJ (111 kcal) (IQR (163–1013 kJ) 39–242), respectively. In adjusted analyses, only consumption of 100 % juice was associated with greater median energetic intake from SSB (adjusted β for each additional ounce = 13; 95% CI 8, 31 (3·2; 95 % CI 2·0, 7·3). Conclusions: Among pregnant and postpartum women in WIC-enrolled families, interventions to reduce SSB consumption should include reduction of 100 % juice consumption as a co-target of the intervention.

scholarly journals Weighted Median Regression Estimates

1978 ◽  
Vol 6 (3) ◽  
pp. 603-609 ◽  
Author(s):  
Friedrich-Wilhelm Scholz
Keyword(s):  
Median Regression ◽  
Weighted Median
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