Multiple linear and nonlinear regression analyses of factors causing calving difficulty.

Multiple linear and nonlinear regression analyses of factors causing calving difficulty. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Multiple linear and nonlinear regression analyses of factors causing calving difficulty. Abstract Text:

R E Short,R A Bellows,R B Staigmiller,J B Carr,

Calving difficulty (CD) was analyzed as the dependent variable from observations on 592 first-calf, 2-year-old heifers that were either Angus X Hereford (AH), Charolais X AH or Simmental X AH. Independent variables were birth weight (BW), pelvic area (PA), BW.(33), PA.(5), cow weight (CW), cow condition score (CS) and sex of calf (S). CD was analyzed as score (1 = no difficulty through 4 = extreme difficulty) CD-I, % CD (1 vs 2 + 3 + 4 , CD-II) or % high CD (1 + 2 vs 3 + 4 , CD-III). R(2) values from CD-II and CD-III multiple correlation (R) analyses were consistently lower (.10 to .13) than from the CD-I analysis. When only BW and PA were included in the model, R(2) values for CD-I were .36, .39 and .39 for the linear, quadratic and cubic analyses, respectively. When BW, PA, CW, CS and S were included in the model, the R(2) values for CD-I were .40 and .42 for the linear and quadratic analyses (cubic effects were not tested). In the linear analysis with BW.(33) and PA.(5), the R(2) for CD-I was .36. In all analyses, the order of importance of the factors studied was BW and PA, with a much lower contribution from CW and S. CS did not account for a significant increase in R(2) in any analysis. CD remained below 50% whenever the PA BW ratio exceeded 8.4. This ratio is a convenient practical method to relate PA and BW to CD. Conclusions are that the linear effects of BW and PA account for the majority of the identified variation in CD (R(2)) and that small increases in R(2) can be obtained by adding CW, CS and S to the model and/or by expanding the model to include quadratic effects.

Multiple linear and nonlinear regression analyses of factors causing calving difficulty. Publishing Authors By Initials

RE Short,RA Bellows,RB Staigmiller,JB Carr,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Multiple linear and nonlinear regression analyses of factors causing calving difficulty. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 12

Page Numbers: 121-30

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Sep

YEAR: 1979

Multiple linear and nonlinear regression analyses of factors causing calving difficulty. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 421510

Multiple linear and nonlinear regression analyses of factors causing calving difficulty. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Multiple linear and nonlinear regression analyses of factors causing calving difficulty. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Multiple linear and nonlinear regression analyses of factors causing calving difficulty.

AFFILIATION: Livestock and Range Research Station, Miles City, MT 59301 USA; U. S. Department of Agriculture, Miles City, MT 59301 USA; Montana Agricultural Experiment Station, Miles City, MT 59301 USA.

Country: United States

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Theriogenology

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Multiple linear and nonlinear regression analyses of factors causing calving difficulty Related Publications

• A role for short-term synaptic facilitation and depression in the processing of intensity information in the auditory brain stem.
• An unexpected observation concerning the effect of anionic additives on the retention behavior of basic drugs and peptides in reversed-phase liquid chromatography.
• Association of the ADHIB*3 allele with alcohol-related phenotypes in Trinidad.
• Chronic food restriction: enhancing effects on drug reward and striatal cell signaling.
• Current management of varicose veins.
• Depression, immunity, and survival in patients with hepatobiliary carcinoma.
• Development of N-methyl-D-aspartate receptor subunits in avian auditory brainstem.
• Discriminatory attitudes toward persons living with HIV/AIDS in Jamaica: a hierarchical analysis of university students.
• Dyloject, a novel injectable diclofenac formulation, offers greater safety and efficacy than voltarol for postoperative dental pain.
• Dysregulation of the hypothalamic-pituitary-adrenal axis in postpartum depression.
• Effect of scanner type on the reproducibility of extracoronary measures of calcification: the multi-ethnic study of atherosclerosis.
• Efficacy of an automated flossing device in different regions of the mouth.
• Fast gradient elution reversed-phase liquid chromatography with diode-array detection as a high-throughput screening method for drugs of abuse. II. Data analysis.
• First molecular surveillance report of HIV type 1 in injecting drug users and female sex workers along the U.S.-Mexico border.
• Lipoic acid stimulates cAMP production in T lymphocytes and NK cells.
• Loss of bonded phase in reversed-phase liquid chromatography in acidic eluents and practical ways to improve column stability.
• Molecular biology. Beginning at the end.
• Multiple linear and nonlinear regression analyses of factors causing calving difficulty.
• Nonlinear cross-phase modulation with intense single-cycle terahertz pulses.
• Occurrence of neonatal and postnatal mortality in range beef cattle. I. Calf loss incidence from birth to weaning, backward and breech presentations and effects of calf loss on subsequent pregnancy rate of dams.
• Oligoadenylate synthetase/protein kinase R pathways and alphabeta TCR+ T cells are required for adenovirus vector: IFN-gamma inhibition of herpes simplex virus-1 in cornea.
• Peak capacity optimization of peptide separations in reversed-phase gradient elution chromatography: fixed column format.
• Public health informatics training in New Mexico.
• Regulation of alpha-synuclein expression in alcohol-preferring and -non preferring rats.
• Specific SNARE complex binding mode of the Sec1/Munc-18 protein, Sec1p.
• Strains of singlehood in later life: do race and gender matter?
• Susceptibility of CCR5-deficient mice to genital herpes simplex virus type 2 is linked to NK cell mobilization.
• The adenosine A2A receptor agonist, CGS-21680, blocks excessive rearing, acquisition of wheel running, and increases nucleus accumbens CREB phosphorylation in chronically food-restricted rats.
• The behavior of proteolipids on dextran gel columns eluted with organic solvents.
• Visceral and subcutaneous adiposity measurements in adults: influence of measurement site.