scholarly journals Reproducibility and relative validity of a newly developed web-based food-frequency questionnaire for assessment of preconception diet

BMC Nutrition ◽  
2019 ◽  
Vol 5 (1) ◽  
Author(s):  
L. Salvesen ◽  
E. R. Hillesund ◽  
F. N. Vik ◽  
A. L. Brantsæter ◽  
N. C. Øverby
Keyword(s):  
Correlation Coefficient ◽  
Rank Correlation ◽  
Food Groups ◽  
Cohen’S Kappa ◽  
Food Frequency ◽  
Relative Validity ◽  
Spearman’S Rank Correlation ◽  
Cohen's Kappa ◽  
Spearman’S Rank Correlation Coefficient ◽  
Median Correlation

Abstract Background The importance of diet and nutrition during preconception age is a window of opportunity to promote future parental and transgenerational health. As a sub-study to a large Norwegian study, ‘Diet today – health of tomorrow’, a food-frequency questionnaire (FFQ) was developed to assess diet during the preconception phase in young adults aged 20 – 30 years and in this paper we report the reproducibility and relative validity of this questionnaire. Methods The FFQ was developed from an existing FFQ validated in adolescents. Participants were recruited on social media and at a university. Reproducibility was assessed by comparing the test and retest of the FFQ. Relative validity was assessed by comparing intake measured by the FFQ with a 7-day weighed food record. Energy, nutrients and food intake were used to assess the reproducibility and relative validity of the FFQ. The study applied the Spearman’s rank correlation coefficient, percentage of agreement and Cohen’s Kappa to assess reproducibility and validity. Results There were 32 participants recruited to the study, of which 21 participants completed both the test-retest reproducibility and the relative validation. The test-retest reproducibility had a median correlation coefficient of 0.85 for energy and nutrients, a median Spearman’s rank correlation coefficient of 0.75 and a median Cohen’s Kappa of 0.51 for food groups. The relative validity of the FFQ had a median correlation coefficient of 0.59 for energy and nutrients, a median Spearman’s rank correlation coefficient of 0.54 and a median Cohen’s Kappa of 0.28 for food groups. Conclusion This newly developed FFQ for preconception diet in young adults had a satisfactory test-retest reproducibility and fair relative validity.

scholarly journals Validation of Prototype Research Software– Infant Prakriti Assessment (PRS-IPA): Inferences from a Cross Sectional Pattern

2020 ◽  
Vol 9 (4) ◽  
pp. 391-395
Keyword(s):  
Correlation Coefficient ◽  
Rank Correlation ◽  
Kappa Coefficient ◽  
Cohen’S Kappa ◽  
Cross Sectional ◽  
Research Software ◽  
Spearman’S Rank Correlation ◽  
Cohen's Kappa ◽  
Spearman’S Rank Correlation Coefficient ◽  
Assessment Questionnaire

Introduction: Prakriti determination in an infant helps to live more healthy and prosperous life by changing their rearing plan accordingly to prevent onset of related disorders in future. Validation under this study was planned to evaluate the agreement between Infant’s Prakriti Assessment questionnaire (IPAQ) and PRS-IPA (Prototype Research Software-Infant Prakriti Assessment), a software for Prakriti assessment in infants. Materials and methods: A cross sectional study was carried out in Sir Sunderlal Hospital BHU and data were analyzed through two step Prakriti determination process i.e. first, by Infant’s Prakriti Assessment questionnaire (IPAQ) and second by PRS-IPA. Validation was done by Spearman’s Rank Correlation Coefficient and Cohen's kappa coefficient. Observations and Result: In this study, Cohen's kappa coefficient was found 0.955 which is highly significant. Prakriti assessed by PRS-IPA software is valid. Validation by Spearman’s Rank Correlation coefficient was also found highly significant (p=0.000). Discussion & Conclusion: The data, derived from spearman’s and kappa suggest its validity and PRS-IPA can be used for the Prakriti assessment with accuracy in infants

scholarly journals Comparison of diet measures from a food-frequency questionnaire with measures from repeated 24-hour dietary recalls. The Norwegian Women and Cancer Study

2007 ◽  
Vol 10 (10) ◽  
pp. 1094-1103 ◽  
Author(s):  
Anette Hjartåker ◽  
Lene Frost Andersen ◽  
Eiliv Lund
Keyword(s):  
Food Frequency Questionnaire ◽  
Rank Correlation ◽  
Calibration Coefficient ◽  
Food Groups ◽  
Added Sugar ◽  
Food Frequency ◽  
Cancer Study ◽  
Spearman’S Rank Correlation ◽  
Spearman’S Rank Correlation Coefficient ◽  
Good For

AbstractObjectiveTo compare diet measures from a food-frequency questionnaire (FFQ) with measures from 24-hour dietary recalls (24HDRs).DesignThe participants answered an FFQ after completing four, repeated 24HDRs during a year.SettingNorway, nationwide.SubjectsOf 500 women randomly selected from The Norwegian Women and Cancer Study (the Norwegian arm of the European Prospective Investigation into Cancer and Nutrition), 286 agreed to participate and 238 completed the study.ResultsOn the group level, the FFQ overestimated absolute intake in seven and underestimated intake in six of 21 food groups. Intakes of energy, fat, added sugar and alcohol were lower in the FFQ than in the 24HDRs, whereas intake of fibre was higher. Spearman's rank correlation coefficient ranged from 0.13 (desserts) to 0.82 (coffee) for foods, and from 0.25 (β-carotene) to 0.67 (alcohol) for nutrients. Three per cent of the observations on nutrient intake fell in the opposite quintile when classified according to the FFQ as compared with the 24HDR. The median calibration coefficient, calculated by regression of the 24HDR data on the FFQ data, was 0.57 for foods and 0.38 for nutrients.ConclusionsThe FFQ's ability to rank subjects was good for foods eaten frequently and fairly good for macronutrients in terms of energy percentages. Weaker ranking abilities were seen for foods eaten infrequently and for some micronutrients. The results underline the necessity of performing measurement error corrections.

scholarly journals Validity and reproducibility of two semi-quantitative alcohol frequency questionnaires for the Colombian population

2006 ◽  
Vol 9 (6) ◽  
pp. 763-770 ◽  
Author(s):  
Oscar F Herrán ◽  
María F Ardila
Keyword(s):  
Correlation Coefficient ◽  
Alcohol Intake ◽  
Rank Correlation ◽  
Kappa Statistic ◽  
Cost Effective ◽  
Weighted Kappa ◽  
Relative Validity ◽  
Spearman’S Rank Correlation ◽  
Spearman’S Rank Correlation Coefficient ◽  
Alcoholic Drinks

AbstractObjectiveTo determine the relative validity and reproducibility of two alcohol intake frequency questionnaires (AFQ-A; AFQ-B), designed to classify subjects according to their alcohol intake level, in Bucaramanga, Colombia.MethodOne hundred and nine randomly selected subjects, aged between 20 and 60 years, completed three 30-day semi-quantitative alcohol intake records (30-DR). The AFQs were applied three months after the last 30-DR. AFQ-A contained 53 items; AFQ-B contained five items, with the alcoholic drinks for AFQ-B selected by Max_r. The correlation and agreement between alcohol intake assessed with the AFQs and the 30-DR were obtained using Pearson's correlation coefficient (r), Lin's concordance correlation coefficient (pC), Spearman's rank correlation coefficient(rS), Bland and Altman's limits of agreement (LOA) and Cohen's weighted kappa statistic (Kw).ResultsThe reproducibility of the 30-DR was poor; rS ranged from 0.33 to 0.41. The reproducibility of the AFQs was higher, with rS between 0.50 and 0.73. The agreement(Kw) of the 30-DR and the AFQs was 0.40. The lower and upper LOA were between 56.4% and 11.0%. The AFQs and 30-DR were well correlated. Assessment of relative validity between the two methods yielded r values for alcohol between 0.52 Alcohol consumption and 0.60, which reduced to 0.20–0.29 after energy adjustment.ConclusionsThese AFQs may be useful to rank subjects according to their alcohol Max_r intake. The AFQ-B is easy and quick to apply, and is also highly cost-effective.

scholarly journals The relationship between the effectiveness of performing technical elements and indicators of static and dynamic balance in young acrobats 6-7 years old

2021 ◽  
Vol 7 (4) ◽  
pp. 58-68
Author(s):  
T. Chernykh ◽  
V. Mulyk ◽  
K. Mulyk ◽  
А. Skaliy ◽  
А. Ostrowski ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Dynamic Equilibrium ◽  
Dynamic Balance ◽  
Rank Correlation ◽  
Young Athletes ◽  
Spearman’S Rank Correlation ◽  
Spearman’S Rank Correlation Coefficient ◽  
Initial Stage ◽  
Equilibrium Test ◽  
The Relationship

Purpose: to determine the relationship between the performance of basic elements and indicators of static and dynamic balance in the training process of young acrobats 6-7 years. Material and methods. The study involved 16 young acrobats at the stage of initial training (age 6-7 years). All parents of the participants gave written consent for the participation of children in the study. The study involved testing the technique of performing basic elements of sports acrobatics and assessing the static and dynamic balance of young athletes. The relationship between (swallow, shoulder blade, forward squat, wheel (sideways overturning), bridges) and static and dynamic equilibrium tests was determined. Spearman's rank correlation coefficient method was used as a method of statistical analysis. Results. It is established that the largest relationship between the performance of basic elements and static balance in the basic exercises of young acrobats have: Romberg's test with the elements "Swallow", "Stand on the shoulders", "Bridge"; Biryuk test with elements "Swallow", "Wheel", "Bridge"; balance "Swallow" with elements "Swallow", "Wheel"; static equilibrium test with the elements "Swallow", "Rack on the shoulders", "Rolling forward with a squat", "Wheel". Reliable values ​​of the correlation coefficient were established between the tests of dynamic balance and the basic elements of sports acrobatics in young athletes 6-7 years, namely: "Swallow", "Flip forward with a squat", "Wheel" and "Bridge". The analysis of special tests of static and dynamic balance in mastering the basic elements of acrobatics at the first stage of long-term training makes it possible to use them to determine the level of coordination capabilities of young athletes and further improve the use of acrobatic exercises. Conclusions. A reliable relationship between the performance of basic exercises and indicators of static and dynamic balance in young acrobats at the initial stage of training. It is shown that the level of static and dynamic balance is of great importance for the assimilation and improvement of basic elements of technology by young acrobats 6-7 years. Static and dynamic balance tests can be used to individually build training programs and young acrobats. It is shown that sports acrobatics is a significant means of developing the balance of children 6-7 years.

scholarly journals The association between parameters of oral mucosal immunity and 25-hydroxyvitamin D in patients with rampant caries

2022 ◽  
Vol 20 (4) ◽  
pp. 32-38
Author(s):  
A. S. Putneva ◽  
T. M. Karavaeva ◽  
M. V. Maksimenya ◽  
P. P. Tereshkov ◽  
M. N. Mishchenko ◽  
...  
Keyword(s):  
Plasma Level ◽  
Correlation Coefficient ◽  
Rank Correlation ◽  
Control Group ◽  
Hydroxyvitamin D ◽  
Spearman’S Rank Correlation ◽  
Spearman’S Rank Correlation Coefficient ◽  
25 Hydroxyvitamin D ◽  
Tgf Β1 ◽  
Rampant Caries

Aim. To determine the saliva level of immunoregulatory proteins in patients with rampant caries and 25-hydroxyvitamin D (25(OH)D) deficiency and evaluate the association of their concentration with 25(OH)D plasma level.Materials and methods. The study was performed in two groups. The experimental group included 15 patients aged 20–22 years with rampant caries and the 25(OH)D plasma level of < 20 ng / ml. The control group encompassed 15 healthy age-matched volunteers with the 25(OH)D plasma level of 20–100 ng / ml. The concentrations of B7.2 (CD86), free active TGF-β1, CTLA-4, PD-1, Tim-3, LAG-3, IGFBP-4, and ICAM-1 were assessed using flow cytometry. The levels of LL-37 and secretory immunoglobulin A (sIgA) were measured using ELISA. The Spearman’s rank correlation coefficient was used to reveal a correlation between the indicated proteins and the 25(OH)D plasma level.Results. A decrease in B7.2 (CD86), PD-1, Tim-3, sIgA, and LL-37 and elevation of IGFBP-4 and ICAM-1 saliva levels were detected in patients with rampant caries and 25-hydroxyvitamin D deficiency. A positive Spearman’s rank correlation coefficient was revealed between plasma 25(OH)D and saliva levels of free active TGF-β1, CTLA4, B7.2 (CD86), LL-37, and sIgA. A negative correlation was revealed between 25(OH)Dand ICAM-1.Conclusion. 25(OH)D deficiency in patients with rampant caries is associated with decreased levels of B7.2 (CD86), PD-1, Tim-3, sIgA, and LL-37 and elevated levels of IGFBP-4 and ICAM-1 in the saliva. 

scholarly journals Dose Correlation of Danggui and Chuanxiong Drug Pairs in the Chinese Medicine Prescription Based on the Copula Function

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Xuan Zhao ◽  
Wei Lin ◽  
Jiawei Li ◽  
Yunhui Chen ◽  
Anamica Patel ◽  
...  
Keyword(s):  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Correlation Coefficient ◽  
Rank Correlation ◽  
Correlation Coefficients ◽  
Copula Function ◽  
Prescription Database ◽  
Irregular Menstruation ◽  
Spearman’S Rank Correlation ◽  
Spearman’S Rank Correlation Coefficient

Dosage is essential for studying the compatibility and effectiveness of traditional Chinese medicine. Danggui and Chuanxiong are widely used in traditional Chinese medicine for ailments and treatment of various disorders. 628 traditional Chinese medicine prescriptions containing Danggui and Chuanxiong were extracted from the self-built prescription database and screened for the three groups of prescriptions, i.e., irregular menstruation, sores, and stroke. We processed and tested the dosage of Danggui and Chuanxiong and selected the optimal copula function, Gumbel copula function, from the Archimedes function family and elliptical copula function family to establish the data model. To establish the presence of a correlation between the dose of Danggui and Chuanxiong, a graph of the joint distribution function of rank correlation coefficients, Kendall’s rank correlation coefficient and Spearman’s rank correlation coefficient, was used. Our results suggest that the model using the Gumbel copula function better reflects the correlation between the dose of Danggui and Chuanxiong. For irregular menstruation, sores, and strokes, Kendall’s rank correlation coefficients were 0.6724, 0.5930, and 0.7757, respectively, and Spearman’s correlation coefficients were 0.8536, 0.7812, and 0.9285, respectively. In all three prescription groups, the dose of Danggui and Chuanxiong was positively correlated, implying that, as the dosage of one drug increases, the dosage of the other increases as well. From the perspective of data mining and mathematical statistics, the use of the copula function model to evaluate the correlation between the prescribed dosage of the two drugs was innovative and provided a new model for the scientific interpretation of the compatibility of traditional drugs. This might also serve to guide the clinical use of traditional Chinese medicine.

scholarly journals Development, Relative Validity and Reproducibility of the Aus-SDS (Australian Short Dietary Screener) in Adults Aged 70 Years and above

Nutrients ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1436 ◽  
Author(s):  
Adelle M. Gadowski ◽  
Tracy A. McCaffrey ◽  
Stephane Heritier ◽  
Andrea J. Curtis ◽  
Natalie Nanayakkara ◽  
...  
Keyword(s):  
Daily Intake ◽  
Kappa Statistic ◽  
Food Groups ◽  
Cohen’S Kappa ◽  
Relative Validity ◽  
Cohen's Kappa ◽  
Spearman’S Correlation ◽  
Acceptable Agreement ◽  
Dietary Screener ◽  
Good Agreement

The aim of this study was to assess the relative validity and reproducibility of a six-item Australian Short Dietary Screener (Aus-SDS). The Aus-SDS assessed the daily intake of core food groups (vegetables, fruits, legumes and beans, cereals, protein sources and dairy sources) in 100 Australians (52 males and 48 females) aged ≥70 years. Relative validity was assessed by comparing intakes from the Aus-SDS1 with an average of three 24-h recalls (24-HRs), and reproducibility using two administrations of the Aus-SDS (Aus-SDS1 and Aus-SDS2). Cohen’s kappa statistic between the Aus-SDS1 and 24-HRs showed moderate to good agreement, ranging from 0.44 for fruits and dairy to 0.64 for protein. There was poor agreement for legume intake (0.12). Bland–Altman plots demonstrated acceptable limits of agreement between the Aus-SDS1 and 24-HRs for all food groups. Median intakes obtained from Aus-SDS1 and Aus-SDS2 did not differ. For all food groups, Cohen’s kappa statistic ranged from 0.68 to 0.89, indicating acceptable agreement between the Aus-SDS1 and Aus-SDS2. Spearman’s correlation coefficient between Aus-SDS1 and 24-HRs across all food groups ranged from 0.64 for fruit to 0.83 for protein. We found the Aus-SDS to be a useful tool in assessing daily intake of core food groups in this population.

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