scholarly journals Bathymetric and longitudinal distribution analyysis of the rockfish Helicolenus Dactylopterus (Delaroche, 1809) in the southern Tyrrhenian Sea (central Mediterranean)

2009 ◽  
Vol 10 (1) ◽  
pp. 73 ◽  
Author(s):  
T. ROMEO ◽  
L. CASTRIOTA ◽  
P. CONSOLI ◽  
M. FALAUTANO ◽  
G. FLORIO ◽  
...  
Keyword(s):  
T Test ◽  
Longitudinal Distribution ◽  
Tyrrhenian Sea ◽  
Central Mediterranean ◽  
Frequency Distributions ◽  
Weight Relationship ◽  
Helicolenus Dactylopterus ◽  
Southern Tyrrhenian Sea ◽  
Student’S T ◽  
Student’S T Test

This study provides information on bathymetric and longitudinal distribution heterogeneity of the rockfish Helicolenus dactylopterus in the southern Tyrrhenian Sea. Data were drawn from experimental bottom trawl (1996-2002) plus bottom trap (2001-02) surveys. The frequency of occurrence and mean relative density (N/km2) and biomass (kg/km2) indexes were calculated for two survey seasons (spring and autumn), four geographic sectors and three depth strata. MANOVA was used to test fish abundance among years, sectors and strata. Analysis of the length-frequency distributions was carried out by two-way (gears and depths) ANOVA, post hoc multiple comparisons for testing differences among depths and Student’s t test for testing differences between gears. Length-weight relationship was also estimated and the allometric coefficient was tested with the Student’s t test. The results showed a significant positive bathymetric gradient of sizes both for trawl and trap surveys; at same depths, fish caught by traps were significantly longer than those caught by trawl. In spring surveys, significant differences were found among strata for both abundance indexes; in autumn surveys, significant differences between depth strata were found only for density indices. The distribution and abundance patterns of H. dactylopterus along the southern Tyrrhenian Sea was homogeneous among sectors. Length-weight relationship showed a significant positive allometric growth.

First maturity assessment and allometric growth of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), landed at Ternate Island

2014 ◽  
Vol 2 (2) ◽  
pp. 29
Author(s):  
Adi Noman Susanto ◽  
Lawrence J.L Lumingas
Keyword(s):  
Head Circumference ◽  
Sexual Maturity ◽  
T Test ◽  
Skipjack Tuna ◽  
Allometric Growth ◽  
Katsuwonus Pelamis ◽  
Weight Relationship ◽  
Significant Difference ◽  
Student’S T ◽  
Student’S T Test

Title (Bahasa Indonesia): Pendugaan pertama matang kelamin dan pertumbuhan alometri ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758), yang didaratkan di Pulau Ternate Skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), is a very important species for Indonesian fisheries.  A total of 462 specimens (254 males and 208 females) collected from fish landings in Ternate Island from November 2013 to April 2014 were used to estimate length at first sexual maturity, length-weight relationship, and length-head circumference relationship. The length at first sexual maturity (FL50) was 489.68 mm. The length-weight relationship equations were  W = 0.0001*FL2.7232 for males and W = 0.0002*FL2.6595 for females, respectively. Student’s t-test indicated significant deviation of ‘b’ from ‘3’ towards negative allometric growth (p< 0.05).  The length-head circumference relationship equations were HC = 0.5453*FL1.0263for males and HC = 0.6519*FL0.9985for females, respectively. Student’s t-test indicated no significant deviation of ‘b’ from ‘1’ towards isometric growth (p> 0.05).  Analysis of covariance showed that there was no significant difference between sexes (p> 0.05) for both relationships. Hence, a common length-weight relationship and a common length-head circumference relationship can be derived using pooled data of both sexes. Ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758) merupakan  spesies yang sangat penting untuk perikanan Indonesia.  Sejumlah 462 spesimen (254 jantan dan 208 betina) ikan cakalang yang diperoleh dari ikan yang didaratkan di Pulau Ternate, selama periode November 2013 sampai April 2014 telah digunakan untuk menduga panjang matang kelamin pertama, hubungan panjang-berat, dan hubungan panjang-keliling lingkar kepala. Panjang pada saat matang kelamin pertama (PC50) adalah  489,68 mm. Persamaan hubungan panjang-berat diperoleh BT = 0,0001*PC2,7232 untuk jantan dan BT = 0,0002*PC2,6595 untuk betina. Hasil uji-t Student menunjukkan penyimpangan yang nyata ‘b’ dari ‘3’ cenderung ke arah pertumbuhan alometrik negatif (p < 0,05).   Persamaan hubungan panjang-keliling lingkar kepala diperoleh LK = 0,5453*PC1,0263 untuk jantan dan LK = 0,6519*PC0,9985 untuk betina. Hasil uji-t Student menunjukkan deviasi yang tidak nyata nilai ‘b’ dari ‘1’ yang cenderung ke arah pertumbuhan isometrik (p > 0,05).   Analisis kovarians menunjukkan bahwa tidak terdapat perbedaan yang nyata antara jantan dan betina (p > 0,05) untuk kedua hubungan tersebut di atas. Oleh karena itu, suatu hubungan panjang-berat umum dan suatu hubungan panjang-lingkar kepala umum dapat dibuat dengan menggunakan data gabungan kedua jenis kelamin.

scholarly journals Nurses' leadership styles in the icu: association with personal and professional profile and workload

2009 ◽  
Vol 17 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Alexandre Pazetto Balsanelli ◽  
Isabel Cristina Kowal Olm Cunha ◽  
Iveth Yamaguchi Whitaker
Keyword(s):  
Leadership Styles ◽  
Leadership Style ◽  
T Test ◽  
Descriptive Statistics ◽  
Nursing Workload ◽  
Comparison Test ◽  
Multiple Comparison Test ◽  
Professional Profile ◽  
Student’S T ◽  
Student’S T Test

This study aims to explore the association between nurses' leadership styles and personal and professional nursing profile and workload. The sample consisted of seven nurses and seven nursing technicians who were grouped into pairs. At the end of three months, nurses were queried regarding what leadership style would be adopted when the nursing technician under their evaluation delivered care to patients admitted to the ICU. Relevant data was analyzed by applying descriptive statistics, Tukey's multiple comparison test and Student's t-test (p< 0.05). Nursing workload reached 80.1% on average. The personal and professional profile variables did not show any relation with the leadership styles chosen by nurses (p>0.05). The determine, persuade, and share leadership styles prevailed. However, whenever the nursing workload peaked, the determine and persuade styles were used (p<0.05).

scholarly journals Intravesical prostaglandin e2 effectiveness in the prevention of urinary retention after transvaginal reconstruction of the pubo-cervical fascia and short arm sling according to Lahodny: a prospective randomized clinical trial

2010 ◽  
Vol 14 (1) ◽  
pp. 15 ◽  
Author(s):  
G. QUADRI ◽  
N. NATALE ◽  
C. SPREAFICO ◽  
C. BELLONI ◽  
D. BARISANI ◽  
...  
Keyword(s):  
Prostaglandin E2 ◽  
Urinary Retention ◽  
Study Groups ◽  
T Test ◽  
Control Group ◽  
Fisher Exact Test ◽  
Test Results ◽  
Exact Test ◽  
Student’S T ◽  
Student’S T Test

Intravesical prostaglandin E2 is effective in the recovery of spontaneous voiding after transvaginal reconstruction of the pubocervical fascia and short arm sling according to Lahodny. The aim of the study was to compare the effects of intravesical prostaglandin E2 in the prevention of urinary retention after transvaginal reconstruction of the pubocervical fascia and short arm sling according to Lahodny. STUDY DESIGN: From November 1996 to June 1999 fifty women underwent the Lahodny procedure for moderate/severe cystocele and stress urinary incontinence. Women were randomly assigned to 1 of the 2 study groups: intravesical prostaglandin E2 versus controls. Data obtained were analyzed with the Student t test and the Fisher exact test. RESULTS: Two patients of the treatment group had to be excluded from the study, one because of the wrong measurement of the post-voidal residual volume and another due to a fastidious burning sensation which appeared immediately after prostaglandin instillation and required the suspension of the treatment. No other side effects such as nausea, vomiting, diarrhea or hyperthermia were observed. Patients who underwent the prostaglandin E2 treatment showed a recovery of spontaneous voiding after 7.9&plusmn;6.7 days, whereas this interval was significantly longer in the control group, being 12.9&plusmn;9.7 days (p=0.04, Two tailed Unpaired Student's T test). CONCLUSION: The effectiveness and the low associated morbidity mark the treatment with intravesical prostaglandin E2 useful in the recovery of normal voiding after transvaginal pubocervical fascia reconstruction and short arm sling with the procedure according to Lahodny.

scholarly journals Study of Relationship of Anemia among Edentulous Patients

2018 ◽  
Vol 5 (2) ◽  
pp. 105-108
Author(s):  
Lijo Isaac ◽  
A. P. Nirmal Raj ◽  
Reshma Karkera ◽  
R Naveen Reddy
Keyword(s):  
Nutritional Status ◽  
T Test ◽  
Dental Status ◽  
Adult Patients ◽  
Control Group ◽  
Age Group ◽  
Edentulous Patients ◽  
Student’S T ◽  
Relationship Of ◽  
Student’S T Test

Very little studies were done on relationship of the dental status and the nutritional status. The present study was done to study relation between edentulism and the presence of anemia. The study was included of 46 adult patients with edentulism and same numbers of patients were taken as controls. The results were tabulated and analyzed with the help of IBM SPSS statistics 20 using student’s t test. The hemoglobin levels were lower in the edentulous patients that that of the control group. The present study had shown that the nutritional status were poor resulting in anemia in case of edentulous patients as compared to control group with the same age group.  

scholarly journals The influence of proteinuria on tubular transport of Na+, K+, CL

2002 ◽  
Vol 130 (3-4) ◽  
pp. 64-67
Author(s):  
Dejan Petrovic ◽  
Radmila Obrenovic ◽  
Mileta Poskurica ◽  
Biljana Stojimirovic
Keyword(s):  
Statistical Analysis ◽  
Creatinine Clearance ◽  
Significant Influence ◽  
Fractional Excretion ◽  
T Test ◽  
The Third ◽  
Tubular Transport ◽  
Student’S T ◽  
Student’S T Test

Functional and structural damages of tubulointerstitium are caused by proteinuria. The aim of this study was to assess the influence of different proteinuria levels on Na+, K+, Cl tubular transport. We examined 50 patients (24 males, 26 females), mean age 46.50 ? 13.08 years, with mean creati-nine clearence of 87.29 ? 31.17 mL/min. They were separated in three groups depending on proteinuria value. The first group with proteinuria less than 0.3 g/24h included 19 persons (7 males, 12 females), mean age 45.12 ? 13.28 years, with mean creatinine clearance of 94.27 ? 34.70 mL/min. The second group of 18 patients (8 males, 10 females), mean age 45.39 ? 12.64 years had proteinuria of 0.3-3,0 g/24h and mean creatinine clearance of 90.07 ? 31.89 mL/min. The third group had proteinuria level higher than 3.0g/24h and mean creatinine clearance of 73.25 ? 20.44 mL/min. It included 13 patients (9 males, 4 females), mean age 50.08 ? 13.73 years. As a parameter of proteinuria influence on tubular transport of Na+, K+ and Cl-, fractional excretion of these electrolytes, was studied. Student's T test, Mann Whitney U test and c2 test were used for statistical analysis. No statistically significant influence of proteinuria was found on Na+, K+ and Cl tubular transport.

scholarly journals Πρόγνωση ασθενών με κακοήθεια που εισάγονται στη μονάδα εντατικής θεραπείας

2013 ◽  
Author(s):  
Σουσάνα Ανίσογλου
Keyword(s):  
Standard Deviation ◽  
Performance Status ◽  
T Test ◽  
Apache Ii ◽  
Saps Ii ◽  
Student’S T ◽  
Student’S T Test

ΣΚΟΠΟΣ: Η συλλογή, ανάλυση και επεξεργασία στοιχείων ογκολογικών ασθενών που νοσηλεύθηκαν στη Μονάδα Εντατικής Θεραπείας (Μ.Ε.Θ.) και η συσχέτισή τους με συγκεκριμένους πιθανούς παράγοντες κινδύνου .ΥΛΙΚΟ: Πρόκειται για μία προοπτική μελέτη παρατήρησης (prospective observational) σε δείγμα 125 ογκολογικών ασθενών που νοσηλεύθηκαν στη Μ.Ε.Θ. κατά την τελευταία διετία.ΜΕΘΟΔΟΣ: Αξιολογήθηκαν επιδημιολογικοί, κλινικοί και λειτουργικοί παράγοντες. Ειδικότερα ελέγχθηκαν η πρωτοπαθής νεοπλασματική νόσος, η ηλικία, η παρουσία στεφανιαίας νόσου, χρόνιας αποφρακτικής πνευμονοπάθειας, σακχαρώδους διαβήτη, νεφρικής ανεπάρκειας, ο δείκτης μάζας σώματος, η εφαρμογή χημειοθεραπείας ή και ακτινοθεραπείας, η διάρκεια νοσηλείας, τα score βαρύτητας (APACHE II, SAPS II, SOFA) και η έκβαση (εξιτήριο ή θάνατος) και έγιναν συσχετίσεις με τα προηγούμενα στοιχεία. Χρησιμοποιήθηκε το στατιστικό λογισμικό πακέτο SPSS 17.0 (SPSS, Chicago, IL, USA) για Windows. Οι συνεχείς μεταβλητές παρουσιάζονται ως μέσοι όροι + τυπική απόκλιση (mean + standard deviation). Για τη σύγκριση των μέσων όρων μεταξύ δύο ομάδων έγινε χρήση του student’s t-test, εφόσον οι μεταβλητές ακολουθούσαν την κανονική κατανομή και του Mann-Whitney U test στην αντίθετη περίπτωση. Για την ανάδειξη συσχετίσεων μεταξύ ποιοτικών μεταβλητών έγινε χρήση του x2 test.ΑΠΟΤΕΛΕΣΜΑΤΑ: Η θνητότητα ανήλθε στο 48.8%. Στατιστικά σημαντικοί παράγοντες κακής έκβασης κατά την εισαγωγή του ασθενούς στη ΜΕΘ ήταν τα score βαρύτητας (APACHE II, SAPS II, SOFA), το πτωχό performance status και τα συνυπάρχοντα σοβαρά νοσήματα. Στατιστικά σημαντικοί παράγοντες κακής έκβασης κατά τη διάρκεια νοσηλείας του ασθενούς στη Μ.Ε.Θ. ήταν η διάρκεια του μηχανικού αερισμού, η χρήση αγγειοσυσπαστικών, η πολυοργανική ανεπάρκεια και η σηπτική κατάσταση. Από τις εργαστηριακές εξετάσεις στατιστικά σημαντικές ήταν ο χαμηλός αριθμός αιμοπεταλίων και η θετική αιμοκαλλιέργεια. Ο στατιστικός έλεγχος αξιολόγησης κατά Hosmer Lemeshow παρά τον σχετικά μικρό αριθμό του δείγματος επιβεβαίωσε τη χρησιμότητα των APACHE II, SAPS II, SOFA ως προγνωστικών μοντέλων.ΣΥΜΠΕΡΑΣΜΑΤΑ: Η πρόγνωση ογκολογικών ασθενών που εισάγονται στη ΜΕΘ είναι μέτρια. Υπάρχουν σαφείς προγνωστικοί παράγοντες κινδύνου που μπορούν να συνθέσουν ένα είδος προγνωστικού μοντέλου, ωστόσο απαιτούνται περαιτέρω πολυκεντρικές μελέτες με προοπτικό χαρακτήρα σε μεγαλύτερο αριθμό ασθενών.

On the Use of Student's t-Test in an Asymmetrical Population

Biometrika ◽  
1949 ◽  
Vol 36 (3/4) ◽  
pp. 426
Author(s):  
S. G. Ghurye
Keyword(s):  
T Test ◽  
Student’S T ◽  
Student’S T Test
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