Effect of birthweight and birth rank on the survival of single and twin lambs born to ewe lambs

2010 ◽  
Vol 50 (6) ◽  
pp. 460 ◽  
Author(s):  
N. M. Schreurs ◽  
P. R. Kenyon ◽  
F. J. Mulvaney ◽  
P. C. H. Morel ◽  
D. M. West ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Relative Risk ◽  
Standard Deviation ◽  
Management Options ◽  
Ewe Lambs ◽  
Birth Rank ◽  
Ewe Lamb ◽  
The Mean ◽  
Risk Ratios ◽  
High Range

Benefits of ewe lamb mating include improved lifetime production, increased rates of genetic gain and higher net profits. These benefits are only achieved if the ewe lamb successfully rears its offspring to weaning. A meta-analytic approach was used to assess the effects of birthweight and the interacting effect of birth rank on the survival to weaning of lambs born to ewe lambs. The data were from eight studies where birthweight and weight at weaning had been recorded for lambs born from ewe lambs. Data were for single- (n = 1392) or twin-born lambs (n = 456). The twin lambs were further classified as the ‘heavier’ or ‘lighter’ of the pair to give three birth rank categories. To compare the probability of dying before weaning between birth ranks, but with lambs compared at a similar birthweight, lambs were categorised by their birthweight as heavy (>3.8 kg) or light (<3.8 kg) and also categorised within their birth rank on their placement around the mean birthweight (birthweight deviation). A mid-range birthweight deviation fell between one standard deviation above or below the mean for each birth rank, whereas a low- and high-range birthweight fell below and above the mid-range, respectively. Logistic regression was used to assess the effect of birth rank (single, heavier twin and lighter twin) and birthweight on lamb mortality up to weaning. To compare the probability of surviving up to weaning between the different birth ranks, relative risk ratios were calculated. Birth ranks were compared for lambs within the same birthweight group (heavy or light) and same birthweight deviation (low-, mid-, high-range). Decreasing birthweight increased mortality before weaning in twins and the change in mortality was greater for the lighter twin. Birthweight did not alter mortality before weaning in singles. Comparison of the birth ranks showed that there were differences (P < 0.05) in the probability of dying for lambs of different birth ranks but similar birthweight. The results suggest that management options for ewe lambs that increase the birthweight of the lighter twin could increase the weaning percentage.

scholarly journals Evaluation of variation of D-dimer levels in COVID-19 patients to predict the disease outcome in a hospital based study

2020 ◽  
Vol 24 (5) ◽  
Author(s):  
Shahtaj Khan ◽  
Hamzullah Khan ◽  
Saba Khan ◽  
Mansoor Akhtar
Keyword(s):  
Relative Risk ◽  
Survival Rate ◽  
Standard Deviation ◽  
Age Groups ◽  
Female Gender ◽  
P Value ◽  
The Mean ◽  
And Gender ◽  
Age Range ◽  
D Dimer

Objectives: To determine the variation of d-dimers in COVID-19. To determine the contribution of demographic factors (age and gender) toward an elevated d-dimers values. To determine the probability of surviving in different age groups in COVID-19, with d-dimer > 0.5 µg/ml. Methodology:  A total of 193 patients were enrolled from COVID-19 isolation units, Hayatabad medical complex Peshawar, whose d-dimer levels were performed as per instructions of the treating physician and were followed. Relevant information’s were recorded on a pre-designed performa prepared in accordance with the objectives of the study. Results: Out of total 193 patients 152(78.8%) were males and 41(21.2%) females. 94(48.7%) patients were in the age range 35-55 y while 76(39.4%) patients had age more than 55 y. Regarding d-dimer readings, 162(83.9%) had d-dimer levels more than 0.5 µg/ml. The mean with standard deviation of age of the patients was 52 ± 13 y. The mean with standard deviation of d-dimer values of the patients was 4.9 ± 13.3 µg/ml. It was observed that, the relative risk of deranged values of d-dimers was 1.18 (rr = 1.18) in patients with age > 55 y. Similarly in female gender the relative risk of higher values of d-dimers above normal was 1.26 (rr = 1.26) without reaching a statistically significant p-value (p = 0.48). The probability of worse outcome in term of death was 2.06 times more in patients with d dimers > 0.5 µg/ml (OR = 2.06). Furthermore the probability of surviving was 90-100% by age < 50 y, 80% in age range 51-60 y, 45% in age range 61-70 y and 30% at age  > 80 y. Conclusion: The deranged d-dimer levels were noted in 84% of the COVID-19 patients. Age > 55 y and female gender are at higher risk of deranged d-dimers and further consequences. Survival rate of patients with deranged d-dimers drops to 30% in patients with age > 80 y, 45% at age < 70 y. Key word: COVID-19, D-dimers, survival rate, prognostic values Anaesth. pain intensive care 2020;24(5): Received: 20 June 2020, Reviewed: 24, 28 June 2020, Accepted: 1 July 2020

Response of additional ewe lamb liveweight during gestation on birth and weaning weight of offspring and liveweight of the ewe lamb at weaning

2010 ◽  
Vol 50 (6) ◽  
pp. 528 ◽  
Author(s):  
N. M. Schreurs ◽  
P. R. Kenyon ◽  
F. J. Mulvaney ◽  
P. C. H. Morel ◽  
D. M. West ◽  
...  
Keyword(s):  
Management Practices ◽  
Analytic Approach ◽  
Gestation Period ◽  
Third Trimester ◽  
Management Options ◽  
Weaning Weight ◽  
Early Gestation ◽  
Positive Effects ◽  
Ewe Lambs ◽  
Ewe Lamb

Increasing the liveweight of ewe lambs during gestation may have positive effects on lamb birthweight and weaning weight and also on ewe lamb liveweight at weaning. Specific times during the gestation period of the ewe lamb may be more responsive to improved nutrition and increases in liveweight. The objective of this work was to use a meta-analytic approach to investigate the effects of ewe lamb liveweight at mating and during pregnancy on lamb birth and weaning weights, and the ewe lamb’s liveweight at weaning. Increasing ewe lamb liveweight in early gestation and in particular before mating gave the greatest increases in the birth and weaning weight of the lambs, and also of the ewe lamb’s liveweight at weaning compared with increasing liveweight in the second and third trimester of gestation. This indicates that management practices for ewe lambs that generate higher liveweight at mating are likely to result in increased lamb survival, higher weaning percentages, greater lamb weaning weights and create rising 2-year-old ewes with better liveweight for mating in the subsequent season. Compared with ewe lambs that gave birth and reared singletons to weaning, those ewe lambs that gave birth to twins and reared twins had greater increases in lamb birthweights, lamb weaning weights and ewe lamb weights at weaning for each extra kilogram of ewe lamb liveweight during gestation. For ewe lambs, especially those that birth and rear twins, management options that increase the pre-mating weights will have the greatest response in lamb birthweight, weaning weight and liveweight of the ewe lamb itself at weaning.

scholarly journals Tinnitus information online – does it ring true?

2018 ◽  
Vol 132 (11) ◽  
pp. 984-989 ◽  
Author(s):  
R M McKearney ◽  
R C MacKinnon ◽  
M Smith ◽  
R Baker
Keyword(s):  
Hearing Loss ◽  
Standard Deviation ◽  
Quality Information ◽  
Flesch Reading Ease ◽  
Ease Score ◽  
The Mean ◽  
High Range

AbstractObjectiveTo assess, using standardised tools, the quality and readability of online tinnitus information that patients are likely to access.MethodsA standardised review was conducted of websites relating to tinnitus and its management. Each website was scored using the DISCERN instrument and the Flesch Reading Ease scale.ResultsTwenty-seven unique websites were evaluated. The mean DISCERN score of the websites was 34.5 out of 80 (standard deviation = 11.2). This would be considered ‘fair’ in quality. Variability in DISCERN score between websites was high (range, 15–57: ‘poor’ to ‘very good’). Website readability was poor, with a mean Flesch Reading Ease score of 52.6 (standard deviation = 7.7); this would be considered ‘difficult’ to read.ConclusionIn general, the quality of tinnitus websites is fair and the readability is poor, with substantial variability in quality between websites. The Action on Hearing Loss and the British Tinnitus Association websites were identified as providing the highest quality information.

Abstract WP220: The Effect of Self-Reported Optimism on the Incidence of Stroke

Stroke ◽  
2017 ◽  
Vol 48 (suppl_1) ◽  
Author(s):  
Ahmed Malik ◽  
Haseeb Rahman ◽  
Adnan Qureshi ◽  
Martha A Wojtowycz
Keyword(s):  
Risk Factors ◽  
Logistic Regression ◽  
Regression Analysis ◽  
Standard Deviation ◽  
Confidence Interval ◽  
Stroke Prevention ◽  
Odds Ratio ◽  
Categorical Variables ◽  
The Mean ◽  
Baseline Characteristics

Purpose: The purpose of this study is to determine whether having an optimistic outlook on life decreases the risk of developing incident stroke. Methods: Participants who developed incident stroke in Americans’ Changing Lives study, and participants who did not develop incident stroke (dependent variable) in were compared for demographics, baseline characteristics, comorbidities, and optimistic outlook on life. Numbers and proportions of respondents in both groups were reported for all categorical variables, while mean and standard deviation were reported for age. All statistically significant variables from the above analyses were entered into a logistic regression analysis to ascertain the association between optimistic outlook on life and stroke. Results: Of the 98,577,928 participants, 73,040,055 did not have stroke at baseline. There were 599,190 who developed incident stroke and 1,104,751 who did not develop incident stroke. The mean age (standard deviation) was lower in those who developed incident stroke compared to those who did not [45.9 (13.8) vs. 46.4 (9.9) p<.0001], and participants with an optimistic outlook on life, were 0.20 times less likely to develop stroke as those who did not have an optimistic outlook on life [OR (Odds ratio) 0.20 95% CI (95% confidence interval) 0.20,0.21], after adjusting for confounders. Conclusions: People who have an optimistic outlook on life are less likely to develop incident stroke. The protective value of optimism lends credence to the value of targeting unconventional risk factors in stroke prevention.

scholarly journals Correlation of Maternal Hemoglobin with Birth Weight: A Hospital Based Study

2021 ◽  
Vol 11 (01) ◽  
pp. 13-16
Author(s):  
Hamzullah Khan ◽  
Khalid Khan ◽  
Neelum Shehzadi ◽  
Huma Riaz
Keyword(s):  
Logistic Regression ◽  
Birth Weight ◽  
Standard Deviation ◽  
Low Birth Weight ◽  
Pearson Correlation ◽  
Hemoglobin Concentration ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Low Birth Weight Babies ◽  
The Mean

Objectives: To determine the correlation of maternal Hemoglobin concentration in labor with birth weight. Study design and setting: This was cross sectional study conducted in Qazi Hussain Ahmed Medical Complex, (QHAMC) Medical Teaching Institution Nowshera, from 20th April 2019 to 31st Jan 2020. Methodology: A total of 254 deliveries were assessed. All pregnant ladies in labor, presenting to labor room of QHAMC Nowshera, irrespective of age were included. The weight of babies was recorded at birth. Pearson correlation and logistic regression and relative risk analysis were used to show the relationship and probability of occurrence of low birth weight babies in anemic and non anemic patients. Results: The mean with standard deviation of hemoglobin in mothers was 10.76+1.63 g/dl. The mean with standard deviation of birth weight was 2.71+0.6 kg. The frequency of low birth weight babies was 68(26.77%) with weight less than 2500g at birth. A positive linear correlation of birth weight with level of hemoglobin of mother in labor was statistically significant (p=0.001, r=0.35). Using logistic regression analysis, it was observed that the probability of LBW in pregnant women with hemoglobin<11g/dl was 3.31 times higher (p= 0.001, OR=3.31). Conclusion: The frequency of LBW is 26.7% markedly higher and maternal anemia is

Does dam parity affect the performance of ewe progeny born to 2-year-old ewes?

2008 ◽  
Vol 48 (7) ◽  
pp. 979 ◽  
Author(s):  
P. R. Kenyon ◽  
S. T. Morris ◽  
H. T. Blair ◽  
K. J. Stafford
Keyword(s):  
Production Systems ◽  
First Year ◽  
Productive Performance ◽  
Breeding Performance ◽  
Female Progeny ◽  
Ewe Lambs ◽  
Birth Rank ◽  
Condition Score ◽  
Ewe Lamb ◽  
Puberty Onset

An increasing number of ewe lambs are being presented for breeding in New Zealand, resulting in more two-tooth ewes of second parity compared with the more normal first parity. The effect of this on the resulting ewe progeny is unknown but is of interest as they are potential replacement ewes. This study was designed to determine if parity of Romney two-tooth ewes had any effect on their ewe lamb progeny to 20 months of age. Two-hundred and fifty female progeny born to two-tooth dams, which had lambed as a ewe lamb (n = 97), failed to conceive at ewe lamb breeding (n = 79), or had not been presented for breeding as a ewe lamb (n = 74), were weighed at regular intervals. The progeny also had onset of puberty and two-tooth breeding and pregnancy scanning performance measured. There were no effects of dam group on liveweight, condition score, 18-month breeding performance or pregnancy diagnosis. However, ewe lambs born to dams which failed to conceive as ewe lambs themselves were less likely (P < 0.05) to achieve puberty. In comparison with single-born lambs, twin-born ewes were lighter (P < 0.05) during their first year of age only. Birth rank had no effect on puberty onset or 18-month breeding performance. These findings indicate that ewe progeny born to second parity two-tooths or two-tooths, which were not presented for breeding as a ewe lamb, do not differ in their productive performance and that either group are suitable as replacement ewes. However, progeny born to two-tooth dams, which failed to conceive as a ewe lamb, would be less suitable as replacement ewes in production systems where ewe lamb breeding is an integral component of the system. Further studies are required to determine if similar relationships would be observed under differing environmental conditions and with different breeds.

scholarly journals Investigation of dental caries prevalence, Decayed, Missing, and Filled Teeth (dmft and DMFT indexes) and the associated factors among 9 - 11 years old children

2020 ◽  
Author(s):  
Ali Alami ◽  
Saeed Erfanpoor ◽  
Elaheh Lael- Monfared ◽  
Ali Ramezani ◽  
Alireza Jafari
Keyword(s):  
Logistic Regression ◽  
Standard Deviation ◽  
Dental Caries ◽  
Associated Factors ◽  
Birth Rate ◽  
Age Groups ◽  
Caries Prevalence ◽  
Multivariate Logistic Regression ◽  
Dmft Index ◽  
The Mean

Abstract Background: Oral hygiene is one of the most important health issues in children that affects the health of children. This study aimed to investigate dental caries prevalence, Decayed, Missing, and Filled Teeth (dmft and DMFT Indexes) and the associated factors among 9 -11 years old children.Materials and Methods: This cross-sectional study was performed on 4226 primary school students aged 9-11 years old using the census method in Iran. Data were collected by valid and reliable researcher-made checklists. Data analysis was performed using SPSS software version 24 and using Kruskal Wallis, Mann-Whitney, and Logistic Regression tests.Results: The prevalence of permanent and primary dental caries in all students was 39.73% and 67.72%. The mean (standard deviation) of DMFT in the 9, 10 and 11 age groups were 0.6 (1.11), 0.97 (1.39) and 1.23 (1.63), respectively. The mean (standard deviation) dmft in the 9, 10 and 11 age groups were 3.14 (2.56), 2.46 (2.34) and 1.37 (1.84), respectively. There was a significant difference in DMFT and dmft between age groups (P<0.001). Results of multivariate logistic regression showed that there is a significant relationship between gender, birth rate, place of residence, mother's education, father's education and use of mouthwash with DMFT index (P<0.05). The results of multivariate logistic regression showed that the variables of insurance, residence and mother's job were significantly correlated with dmft index (P<0.05). Conclusion: In this study, the prevalence of dental caries was high. Variables of gender, birth rate, parental education, place of residence, use of mouthwash, having health insurance and mother's job were effective in predicting dental caries in students. it seems necessary to hold educational courses to increase awareness among students, educators, and parents about oral Health. Keywords: Elementary students, School, dmft, DMFT, Children, Oral health

At Least One Standard Deviation Above the Mean

1969 ◽  
Vol 14 (9) ◽  
pp. 470-471
Author(s):  
M. DAVID MERRILL
Keyword(s):  
Standard Deviation ◽  
The Mean

The Estimation of Blood Platelet Survival

1972 ◽  
Vol 28 (03) ◽  
pp. 447-456 ◽  
Author(s):  
E. A Murphy ◽  
M. E Francis ◽  
J. F Mustard
Keyword(s):  
Standard Deviation ◽  
Least Squares ◽  
Experimental Error ◽  
Blood Platelet ◽  
Least Squares Estimation ◽  
Systematic Relationship ◽  
Platelet Survival ◽  
The Mean ◽  
Normally Distributed

SummaryThe characteristics of experimental error in measurement of platelet radioactivity have been explored by blind replicate determinations on specimens taken on several days on each of three Walker hounds.Analysis suggests that it is not unreasonable to suppose that error for each sample is normally distributed ; and while there is evidence that the variance is heterogeneous, no systematic relationship has been discovered between the mean and the standard deviation of the determinations on individual samples. Thus, since it would be impracticable for investigators to do replicate determinations as a routine, no improvement over simple unweighted least squares estimation on untransformed data suggests itself.

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