scholarly journals Fleckscore system of exterior evaluation as a more accurate indirect predictor of longevity in Slovak Simmental dairy cows

2021 ◽  
Author(s):  
Eva Strapáková ◽  
Peter Strapák ◽  
Juraj Candrák ◽  
Ivan Pavlík ◽  
Katarína Dočkalová
Keyword(s):  
Dairy Cows ◽  
Reference Group ◽  
Proportional Hazard ◽  
Proportional Hazard Model ◽  
Productive Life ◽  
Body Conformation ◽  
Individual Traits ◽  
Weibull Proportional Hazard ◽  
Relationship Of ◽  
The Relationship

The goal of the work was to discover the influence of conformation traits evaluated by the Fleckscore system on the length of productive life of Slovak Simmental dairy cows. Evaluation of body conformation traits according to the Fleckscore system was performed on 3 452 cows. The relationship of individual traits to longevity was analysed using the Weibull proportional hazard model. The results confirmed that smaller and longer cows, which were well muscular and with a deeper body, had a lower risk of early culling than cows in the reference group. Hock angularity, pastern and hoof height scored with low or high marks were associated with an early culling of cows. In terms of the length of productive life, a slightly more elastic pattern is required. Cows with a deeper udder and a stronger and tighter fore udder attachment, which were also average in notching and height central ligament and centrally placed teats, reached a longer productive life.  

scholarly journals Survival analysis of productive life in Brazilian holstein using a piecewise Weibull proportional hazard model

2016 ◽  
Vol 185 ◽  
pp. 89-96 ◽  
Author(s):  
Elisandra Lurdes Kern ◽  
Jaime Araujo Cobuci ◽  
Claudio Napolis Costa ◽  
Vincent Ducrocq
Keyword(s):  
Survival Analysis ◽  
Hazard Model ◽  
Proportional Hazard ◽  
Proportional Hazard Model ◽  
Productive Life ◽  
Weibull Proportional Hazard

On Measures of Affinity for Truncated Distributions

2007 ◽  
Vol 59 (3-4) ◽  
pp. 151-162
Author(s):  
S. Smitha ◽  
K. R. Muraleedharan Nair ◽  
P. G. Sankaran
Keyword(s):  
Functional Form ◽  
Hazard Model ◽  
Subject Classification ◽  
Proportional Hazard ◽  
Proportional Hazard Model ◽  
Characterization Result ◽  
Truncated Distributions ◽  
Relationship Of ◽  
The Relationship

Abstract: In the present paper we define affinity for truncated distributions and examine its properties. The relationship of this measure with other discrimination measures is examined. We also provide a characterization result for the proportional hazard model using the functional form of the truncated affinity. AMS (2000) Subject Classification: 62E10, 90B25

scholarly journals Phenotypic relationships between type traits and productive life using a piecewise Weibull proportional hazard model

2018 ◽  
Vol 75 (6) ◽  
pp. 470-478 ◽  
Author(s):  
Elisandra Lurdes Kern ◽  
Jaime Araujo Cobuci ◽  
Cláudio Napolis Costa ◽  
Vincent Ducrocq
Keyword(s):  
Hazard Model ◽  
Proportional Hazard ◽  
Proportional Hazard Model ◽  
Productive Life ◽  
Type Traits ◽  
Weibull Proportional Hazard

The relationship of rheological behavior of the vaginal fluid at the time of insemination to the pregnancy rate in dairy cows

1997 ◽  
Vol 48 (5) ◽  
pp. 865-871 ◽  
Author(s):  
F. López-Gatius ◽  
J. Labèrnia ◽  
P. Santolaria ◽  
J. Rutllant ◽  
M. López-Béjar
Keyword(s):  
Dairy Cows ◽  
Pregnancy Rate ◽  
Rheological Behavior ◽  
Vaginal Fluid ◽  
Relationship Of ◽  
The Relationship

Age at onset and outcome in schizophrenia are related to the degree of familial loading

1998 ◽  
Vol 173 (6) ◽  
pp. 494-500 ◽  
Author(s):  
Jaana M. Suvisaari ◽  
Jari Haukka ◽  
Antti Tanskanen ◽  
Jouko K. Lönnqvist
Keyword(s):  
Mixed Models ◽  
Early Onset ◽  
Disability Pension ◽  
Psychotic Disorders ◽  
Age At Onset ◽  
Cox Proportional Hazard Model ◽  
Proportional Hazard ◽  
Proportional Hazard Model ◽  
Cox Proportional Hazard ◽  
The Relationship

BackgroundRecent research suggests that high familial loading is associated with early onset of schizophrenia. Results concerning outcome have been controversial.MethodWe assessed the relationship between familial loading, age at onset and outcome in all Finnish patients with schizophrenia born between 1950 and 1969. Patients and their first-degree relatives were identified using nationwide registers. Familial loading scores were calculated for schizophrenia and for combined psychotic disorders, and patients were accordingly classified into three groups: high (n = 761), intermediate (n = 14 247), and low familial loading (n = 725). Linear mixed models and the Cox proportional hazard model were used in the analyses.ResultsOnset was earliest, hospitalisation longest and risk of retirement in receipt of a disability pension highest in the group with high familial loading, with opposite extremes found in the group with low familial loading.ConclusionsHigh familial loading for schizophrenia is associated with early onset and poor outcome of schizophrenia.

Relationship between the scoring of hoof lesions and lameness in dairy cows

2001 ◽  
Vol 2001 ◽  
pp. 172-172
Author(s):  
B. Winkler ◽  
J. K. Margerison
Keyword(s):  
Dairy Cows ◽  
Common Cause ◽  
Hoof Lesions ◽  
Relationship Of ◽  
The Relationship

Claw horn lesions are the most common cause of lameness in dairy cows and the development of lesions is related to the days in lactation. The lameness caused by this lesions is influenced by different factors (Offer et al., 2000). The objective of this experiment was to study the relationship of severity of lameness and severity of scoring for hoof horn lesions.

scholarly journals Factors affecting the functional length of productive life in Slovak Pinzgau cows

2008 ◽  
Vol 53 (No. 3) ◽  
pp. 91-97 ◽  
Author(s):  
G. Mészáros ◽  
J. Wolf ◽  
O. Kadlečík
Keyword(s):  
Milk Production ◽  
Linear Increase ◽  
Production Level ◽  
Proportional Hazard ◽  
Proportional Hazard Model ◽  
Age At First Calving ◽  
Factors Affecting ◽  
Productive Life ◽  
The Impact ◽  
Effect Of Age

A proportional hazard model was used to analyze the impact of the most important factors on the length of productive life in 44 796 Slovak Pinzgau cows. The calculations were carried out with Survival Kit 3.12. The milk production level within a herd was the most important factor. The relation between the milk production level and the culling risk was strongly non-linear. Cows with extremely low milk production (less than 1.5 standard deviations below average) had a 4.8 times higher culling risk than average cows. The culling risk for the highest yielding cows was about one half of the risk of average cows. In the first lactation the culling risk was highest at the beginning and decreased in the course of lactation whereas in subsequent lactations the culling risk was highest at the end of lactation. The risk decreased with parity. The effect of age at first calving did not have a large influence on the length of productive life, although a linear increase in culling risk was observed as the age at first calving increased. Cows from expanding herds were at lower risk to be culled compared to cows in herds of stable and decreasing size.

scholarly journals Human epididymis protein 4 is a new biomarker to predict the prognosis of progressive fibrosing interstitial lung disease

2020 ◽  
Author(s):  
Naoki Nishiyama ◽  
Masahiro Masuo ◽  
Yoshihisa Nukui ◽  
Tomoya Tateishi ◽  
Mitsuhiro Kishino ◽  
...  
Keyword(s):  
Prospective Observational Study ◽  
Interstitial Lung Diseases ◽  
Proportional Hazard ◽  
Proportional Hazard Model ◽  
High Resolution Computed Tomography ◽  
Human Epididymis Protein 4 ◽  
Derivation Cohort ◽  
Human Epididymis ◽  
Cox Proportional Hazard ◽  
The Relationship

Abstract BACKGROUND The clinical course and prognosis of progressive fibrosing interstitial lung diseases ( PF-ILDs) vary from individual to individual. Predictive serum biomarkers for the management of the disease are needed. Serum human epididymis protein 4 (HE4) has been reported to be elevated in patients with IPF, yet its clinical utility has not been elucidated. We evaluated whether serum HE4 could be a biomarker for patients with PF-ILD. METHODS Serum HE4 was measured in a retrospective study that consisted of 34 patients with PF-ILD and 40 healthy volunteers. The relationship between serum HE4 levels and clinical parameters or prognosis was investigated. To validate the significance of the results, a prospective observational study that consisted of 37 patients with PF-ILD and 40 control patients without PF-ILD was performed.RESULTS Serum HE4 was higher in patients with PF-ILD than in health volunteers ( P < 0.01). A correlation of the serum HE4 levels with the extent of honeycombing on chest high-resolution computed tomography was identified (r = 0.41, P = 0.015). In multivariate analysis by the Cox proportional hazard model, higher HE4 levels (> 238 pmol/l) were associated with elevated mortality risk (HR 7.27, 95% CI 1.56-34.0, P = 0.01 in the derivation cohort; HR 44.3, 95% CI 4.19-468, P < 0.01 in validation cohort). CONCLUSIONS Serum HE4 levels may serve as a new diagnostic and prognostic biomarker for patients with PF-ILD.

scholarly journals Relation of the length of productive life and the body conformation traits in Slovak Simmental breed

2010 ◽  
Vol 53 (4) ◽  
pp. 393-402
Author(s):  
P. Strapák ◽  
P. Juhás ◽  
E. Strapáková ◽  
M. Halo
Keyword(s):  
Dairy Cows ◽  
Average Length ◽  
The Body ◽  
Cattle Population ◽  
Body Frame ◽  
Body Depth ◽  
Productive Life ◽  
Body Conformation ◽  
Detailed Evaluation ◽  
Abstract Data

Abstract. Data obtained from the evaluation of longevity in 118 646 dairy cows of the Slovak Simmental breed were analyzed. The average length of productive life reached 1 451 days (3.88 years). Based on the analysis of the length of productive life for the whole cattle population, we calculated the ratio of cows that reached more than 12, 24, 36, 48, 60, 72 and 84 months respectively. The most important effects were the sire (F=53.43, P<0.001) and the farm effect (F=26.32, P<0.001). The milk production at first lactation was an important factor, too. The effects of conformation traits on the length of productive life were analyzed in a group of 6 585 culled cows. From the main conformation traits the most important effects were recorded for body frame, udder, feet and legs. For a detailed evaluation, the level of the effects of a particular body conformation trait were tested. The most important effects were rump angle, croup height and body depth. The analysis of udder traits showed that the most important effects were udder depth, teats length, rear udder attachment and rear udder. From the feet and legs traits the most important effects were recorded for fetlock, foot and rear legs.

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