Reproducibility and validity of an FFQ in the Henan Rural Cohort Study

2019 ◽  
Vol 23 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Yuan Xue ◽  
Kaili Yang ◽  
Bingya Wang ◽  
Chang Liu ◽  
Zhenxing Mao ◽  
...  
Keyword(s):  
Rural Population ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Validity Study ◽  
Food Groups ◽  
Cross Sectional ◽  
Reproducibility Study ◽  
The Mean ◽  
Spearman’S Correlation

AbstractObjective:The present study aimed to evaluate the validity and reproducibility of a thirteen-item FFQ regarding identification of dietary conditions in a rural population in China.Design:A reproducibility study repeated the first FFQ (FFQ1) approximately 4 weeks later (FFQ2). A validity study evaluated the mean of three consecutive 24 h diet recalls as the reference measure.Setting:Cross-sectional study.Participants:Residents of a rural area in Henan Province, which is located in the central region of China.Results:A total of 295 individuals participated in the reproducibility study. In addition, 123 people agreed to participate in the validity study. Spearman’s correlation coefficients between the two FFQ ranged from 0·06 (vegetables) to 0·58 (eggs). Spearman’s correlation coefficients between the two methods of collection ranged from 0·01 for cereal to 0·49 for staple foods. The mean of the intraclass correlation coefficients of the two FFQ (FFQ1 v. FFQ2) was 0·19. Bland–Altman analysis indicated good agreement for most food groups across the range of intake for the two studies.Conclusions:The study demonstrated that our FFQ design could be used as a representative tool to conduct a dietary evaluation of a rural population.

scholarly journals A Quantitative Comparison of Multispectral Refraction Topography and Autorefractometer in Young Adults

2021 ◽  
Vol 8 ◽  
Author(s):  
Yunru Liao ◽  
Zhenlan Yang ◽  
Zijing Li ◽  
Rui Zeng ◽  
Jing Wang ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
High Agreement ◽  
Intraclass Correlation Coefficients ◽  
Repeatability And Reproducibility ◽  
The Mean

Purpose: Purpose of this study is to evaluate the measuring consistency of central refraction between multispectral refraction topography (MRT) and autorefractometry.Methods: This was a descriptive cross-sectional study including subjects in Sun Yat-sen Memorial Hospital from September 1, 2020, to December 31, 2020, ages 20 to 35 years with a best corrected visual acuity of 20/20 or better. All patients underwent cycloplegia, and the refractive status was estimated with autorefractometer, experienced optometrist and MRT. We analyzed the central refraction of the autorefractometer and MRT. The repeatability and reproducibility of values measured using both devices were evaluated using intraclass correlation coefficients (ICCs).Results: A total of 145 subjects ages 20 to 35 (290 eyes) were enrolled. The mean central refraction of the autorefractometer was −4.69 ± 2.64 diopters (D) (range −9.50 to +4.75 D), while the mean central refraction of MRT was −4.49 ± 2.61 diopters (D) (range −8.79 to +5.02 D). Pearson correlation analysis revealed a high correlation between the two devices. The intraclass correlation coefficient (ICC) also showed high agreement. The intrarater and interrater ICC values of central refraction were more than 0.90 in both devices and conditions. At the same time, the mean central refraction of experienced optometrist was −4.74 ± 2.66 diopters (D) (range −9.50 to +4.75D). The intra-class correlation coefficient of central refraction measured by MRT and subjective refraction was 0.939.Conclusions: Results revealed that autorefractometry, experienced optometrist and MRT show high agreement in measuring central refraction. MRT could provide a potential objective method to assess peripheral refraction.

scholarly journals The Reliability of Iodine Concentration in Diaper-Retrieved Infant Urine Using Urine Collection Pads, and in Their Mothers’ Breastmilk

Biomolecules ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 295
Author(s):  
Kjersti Sletten Bakken ◽  
Ingvild Oma ◽  
Synne Groufh-Jacobsen ◽  
Beate Stokke Solvik ◽  
Lise Mette Mosand ◽  
...  
Keyword(s):  
Intraclass Correlation ◽  
Urinary Iodine ◽  
Correlation Coefficients ◽  
Iodine Concentration ◽  
Cross Sectional Study ◽  
Iodine Intake ◽  
Public Healthcare ◽  
Urinary Iodine Concentration ◽  
Childbearing Age ◽  
Cross Sectional

Mild to moderate iodine deficiency is common among women of childbearing age. Data on iodine status in infants are sparse, partly due to the challenges in collecting urine. Urinary iodine concentration (UIC) is considered a good marker for recent dietary iodine intake and status in populations. The aim of this study was to investigate the reliability of iodine concentration measured in two spot-samples from the same day of diaper-retrieved infant urine and in their mothers’ breastmilk. We collected urine and breastmilk from a sample of 27 infants and 25 mothers participating in a cross-sectional study at two public healthcare clinics in Norway. The reliability of iodine concentration was assessed by calculating the intraclass correlation coefficients (ICC) and the coefficient of variation (CV). The ICC for infants’ urine was 0.64 (95% confidence interval (CI) 0.36–0.82), while the ICC for breastmilk was 0.83 (95% CI 0.65–0.92) Similarly, the intraindividual CV for UIC was 0.25 and 0.14 for breastmilk iodine concentration (BIC). Compared to standard methods of collecting urine for measuring iodine concentration, the diaper-pad collection method does not substantially affect the reliability of the measurements.

scholarly journals Development and evaluation of a diet quality screener to assess adherence to the Dutch food-based dietary guidelines

2021 ◽  
pp. 1-28
Author(s):  
Mariëlle G de Rijk ◽  
Anne I Slotegraaf ◽  
Elske M Brouwer-Brolsma ◽  
Corine WM Perenboom ◽  
Edith JM Feskens ◽  
...  
Keyword(s):  
Diet Quality ◽  
Intraclass Correlation ◽  
Total Sample ◽  
Cross Sectional Study ◽  
Dietary Guidelines ◽  
Full Length ◽  
Cross Sectional ◽  
Maximum Score ◽  
The Mean ◽  
Excellent Reproducibility

Abstract The Eetscore FFQ was developed to score the Dutch Healthy Diet index 2015 (DHD2015-index) representing the Dutch food-based dietary guidelines of 2015. This paper describes the development of the Eetscore FFQ, a short screener assessing diet quality, examines associations between diet quality and participants’ characteristics, and evaluates the relative validity and reproducibility of the Eetscore FFQ in a cross-sectional study with Dutch adults. The study sample consisted of 751 participants, aged 19-91 y, recruited from the EetMeetWeet research panel. The mean DHD2015-index score based on the Eetscore FFQ of the total sample was 111 (SD 17.5) out of a maximum score of 160 points and was significantly higher in women than in men, positively associated with age and education level, and inversely associated with BMI. The Kendall’s tau-b coefficient of the DHD2015- index between the Eetscore FFQ and the full-length FFQ (on average 1.7-month interval, n=565) was 0.51 (95% CI 0.47, 0.55), indicating an acceptable ranking ability. The intraclass correlation coefficient (ICC) between DHD2015-index scores derived from two repeated Eetscore FFQs (on average 3.8-month interval, n=343) was 0.91 (95% CI: 0.89, 0.93) suggesting a very good reproducibility. In conclusion, the Eetscore FFQ was considered acceptable in ranking participants according to their diet quality compared with the full-length FFQ and showed good to excellent reproducibility.

scholarly journals Designing and psychometric evaluation of Stretching Exercise Influencing Scale (SEIS)

BMJ Open ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. e026565
Author(s):  
Mohammad Hossien Delshad ◽  
Sedigheh Sadat Tavafian ◽  
Anoshirvan Kazemnejad
Keyword(s):  
Psychometric Properties ◽  
Intraclass Correlation ◽  
Psychometric Evaluation ◽  
Cross Sectional Study ◽  
Medical Sciences ◽  
Cross Sectional ◽  
Valid Instrument ◽  
Good Internal Consistency ◽  
The Mean ◽  
Office Employees

ObjectiveThe lack of reliable and valid tools for assessing the factors that influence stretching exercises (SEs) among Iranian office employees is obvious. This study aimed to design and evaluate psychometric properties of this instrument.DesignCross-sectional study of psychometric properties.SettingData were gathered from May to September 2017.ParticipantsParticipants were 420 office employees who were working in 10 health centres affiliated to the Shahid Beheshti University of Medical Sciences in Tehran, Iran.Primary outcome measuresThe instrument was designed on the basis of the constructs of the health promotion model (HPM) and extant literature. Exploratory factor analysis (EFA), Cronbach’s α and intraclass correlation coefficient (ICC) were employed to check the scale’s psychometric properties.ResultsIn total, 420 questionnaires were completed. The mean age of the office employees was 37.1±8.03 years. Among the 86 items, 77 items had significant item-to-total correlations (p<0.05). The results showed good internal consistency and reliability for the whole questionnaire and each domain. EFA results confirmed 53.32% of the total variance of the items yielded in 11 subscales. The ICC was acceptable (0.78, 95% CI 0.70 to 0.88).ConclusionsThe Stretching Exercise Influencing Scale (SEIS) can be a reliable and valid instrument for measuring the factors that influence SEs among office employees.Trial registrationIRCT20160824295512N1

scholarly journals Is the BESTest at Its Best? A Suggested Brief Version Based on Interrater Reliability, Validity, Internal Consistency, and Theoretical Construct

2012 ◽  
Vol 92 (9) ◽  
pp. 1197-1207 ◽  
Author(s):  
Parminder K. Padgett ◽  
Jesse V. Jacobs ◽  
Susan L. Kasser
Keyword(s):  
Interrater Reliability ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Test Items ◽  
Intraclass Correlation Coefficients ◽  
Eyes Closed ◽  
Functional Reach ◽  
Hip Abductor

Background The Balance Evaluation Systems Test (BESTest) and Mini-BESTest are clinical examinations of balance impairment, but the tests are lengthy and the Mini-BESTest is theoretically inconsistent with the BESTest. Objective The purpose of this study was to generate an alternative version of the BESTest that is valid, reliable, time efficient, and founded upon the same theoretical underpinnings as the original test. Design This was a cross-sectional study. Methods Three raters evaluated 20 people with and without a neurological diagnosis. Test items with the highest item-section correlations defined the new Brief-BESTest. The validity of the BESTest, the Mini-BESTest, and the new Brief-BESTest to identify people with or without a neurological diagnosis was compared. Interrater reliability of the test versions was evaluated by intraclass correlation coefficients. Validity was further investigated by determining the ability of each version of the examination to identify the fall status of a second cohort of 26 people with and without multiple sclerosis. Results Items of hip abductor strength, functional reach, one-leg stance, lateral push-and-release, standing on foam with eyes closed, and the Timed “Up & Go” Test defined the Brief-BESTest. Intraclass correlation coefficients for all examination versions were greater than .98. The accuracy of identifying people from the first cohort with or without a neurological diagnosis was 78% for the BESTest versus 72% for the Mini-BESTest or Brief-BESTest. The sensitivity to fallers from the second cohort was 100% for the Brief-BESTest, 71% for the Mini-BESTest, and 86% for the BESTest, and all versions exhibited specificity of 95% to 100% to identify nonfallers. Limitations Further testing is needed to improve the generalizability of findings. Conclusions Although preliminary, the Brief-BESTest demonstrated reliability comparable to that of the Mini-BESTest and potentially superior sensitivity while requiring half the items of the Mini-BESTest and representing all theoretically based sections of the original BESTest.

scholarly journals I did eat my vegetables. Agreement between parent and child food intake diaries

2016 ◽  
Vol 19 (17) ◽  
pp. 3106-3113 ◽  
Author(s):  
Natalie Rangelov ◽  
L Suzanne Suggs ◽  
Pedro Marques-Vidal
Keyword(s):  
Eating Behaviour ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Food Groups ◽  
Food Diary ◽  
Kendall’S Tau ◽  
Cross Sectional ◽  
Kendall's Tau ◽  
Puff Pastry ◽  
Level Of Agreement

AbstractObjectiveTo assess the level of agreement between children and their parents when reporting a child’s food consumption.DesignCross-sectional study in which children and parents independently completed 7 d food diaries describing the foods and drinks the child consumed at every meal and snack. The association between child and parent reporting was assessed for nineteen food groups using Kendall’s tau-b non-parametric correlations, Spearman’s rank correlations, kappa coefficients and Lin’s concordance measure of agreement. Results were also stratified by gender of the child and his/her grade at school.SettingHouseholds in Ticino, Switzerland, April–June 2014.SubjectsTwo hundred and ninety-nine children aged 6–12 years and one of their parents participated, with 264 providing complete data (35 % completion rate).ResultsResults showed a high level of agreement between child and parent reporting. Spearman correlations ranged from 0·55 (sauces) and 0·57 (fatty meat) to 0·80 (fruit), 0·83 (starchy foods) and 0·84 (pastries). All nineteen Spearman correlations were significant at the 0·001 level. Kendall’s tau-b correlations ranged from 0·44 (fat meat) to 0·81 (puff pastry). Kappa values showed low to high levels of agreement, ranging from 0·15 (sweets) to 0·77 (puff pastry). Lin’s concordance correlation coefficients ranged from 0·39 (whole grains) to 0·86 (puff pastry).ConclusionsWhen assessing the eating behaviour of children using a 7 d food diary, children’s reports might be as reliable as their parents’.

scholarly journals Comparing School-Aged Refraction Measurements Using the 2WIN-S Portable Refractor in Relation to Cycloplegic Retinoscopy: A Cross-Sectional Study

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Ziming Liu ◽  
Emmanuel Eric Pazo ◽  
Hong Ye ◽  
Cui Yu ◽  
Ling Xu ◽  
...  
Keyword(s):  
Gold Standard ◽  
Intraclass Correlation ◽  
Cross Sectional Study ◽  
Mean Value ◽  
Spherical Equivalent ◽  
Sectional Study ◽  
Altman Analysis ◽  
Cross Sectional ◽  
Bland Altman Analysis ◽  
The Mean

Purpose. To assess the repeatability and agreement of refractive measurements using 2WIN-S photoscreening with the gold-standard cycloplegic retinoscope refraction. Design. Single centre, cross-sectional study. Methods. Spherical, cylindrical, axis, and spherical equivalent of 194 bilateral eyes of 97 children were assessed using a retinoscope and 2WIN-S. One week later, another operator repeated the 2WIN-S measurements. The primary outcome measures were to assess the repeatability and agreement between spherical equivalent, J0, and J45 readings of 2WIN-S. The repeatability of measurements was assessed by the within-subject standard deviation (2.77 Sw) and intraclass correlation coefficient (ICC). The agreement between devices was assessed using 95% limits of agreement. The extent of the agreement between cycloplegic retinoscopy and noncycloplegic 2WIN-S measurements was assessed using Bland–Altman analysis. Results. The mean age ± SD was 10.3 ± 2.46 year (range, 4–14 years). The sphere, cylinder, and spherical equivalent measurements were found to be consistent with both apparatus (r value >0.86). ICC for SE, J0, and J45 was 0.900, 0.666, and 0.639, respectively; Sw for SE, J0, and J45 was 0.61D, 0.30D, and 0.31D, respectively; Bland–Altman analysis of retinoscopy with cycloplegia and 2WIN-S for SE was 184/194 (95%) in 95% confidence interval, and the mean value was 0.46. J0 was 184/194 (95%), and the mean value is −0.04. J45 was 181/194 (93%), and the mean value is −0.15. Conclusion. The objective refractive measurement of 2WIN-S had good reliability and high agreement with the gold-standard retinoscopy refraction in children and adolescents. While consistency was observed, it is essential to take into consideration that it is a screening tool.

The choice of chromogen and reliability of contact rhinoscopy in the irradiated nasopharynx

2007 ◽  
Vol 122 (2) ◽  
pp. 177-180 ◽  
Author(s):  
Martin W Pak ◽  
Samuel Chow ◽  
C A van Hasselt
Keyword(s):  
Methylene Blue ◽  
Squamous Metaplasia ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional ◽  
Vital Stain ◽  
Intraclass Correlation Coefficients ◽  
Observer Reliability ◽  
Blue Stain ◽  
The Mean

AbstractA cross-sectional randomised single blind study was conducted to assess how concentrations of chromogen (vital stain) and the characteristics of the assessors affect the assessment of contact rhinoscopy. Twenty-eight patients who had undergone external radiotherapy for nasopharyngeal carcinoma were assessed by contact rhinoscopy using 0.5 per cent and 1 per cent methylene blue stain on opposite sides of the nasopharynx. Three independent observers assessed the visual clarity of the 45 contact endoscopic images showing squamous metaplasia according to a visual analogue scale. The intraclass correlation coefficients were 0.916 to 0.957 and 0.839 to 0.964 for intra-observer reliability of assessors in the groups of 0.5 per cent and 1 per cent stains, respectively. The intraclass correlation coefficients for inter-observer reliability of assessors were 0.884 and 0.885 in the groups of 0.5 per cent and 1 per cent stains, respectively. The mean scores of clarity of the cellular details were statistically higher in the group of 1 per cent stain among all assessors. These results showed that the assessment of squamous metaplasia by contact endoscopy is highly reliable irrespective of the clinical experience and knowledge of histopathology of the assessors. One per cent methylene blue should be the vital stain of choice in contact endoscopy.

scholarly journals Refraction and Ocular Biometry of Preschool Children in Shanghai, China

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Luoli Zhang ◽  
Xiangui He ◽  
Xiaomei Qu ◽  
Xiaofang You ◽  
Bingjie Wang ◽  
...  
Keyword(s):  
Preschool Children ◽  
Age Groups ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Ocular Biometry ◽  
School Based ◽  
Biometric Measurements ◽  
The Mean ◽  
Low Prevalence ◽  
Spearman’S Correlation

Purpose. To investigate the refraction and ocular biometry characteristics and to examine the prevalence of refractive errors in preschool children aged 3 to 6 years in Shanghai, China. Methods. A school-based cross-sectional study was conducted in Jiading and Xuhui District, Shanghai, in 2013. We randomly selected 7 kindergartens in Jiading District and 10 kindergartens in Xuhui District, with a probability proportionate to size. The children underwent comprehensive eye examinations, including cycloplegic refraction and biometric measurements. Myopia, hyperopia, astigmatism were defined as spherical equivalent (SE) ≤ −0.50 D, SE ≥ +2.00 D, and cylindrical diopters ≤ −1.00 D. Results. The mean SE for 3- to 6-year-old children was +1.20 D (standard deviation [SD] 1.05), and the mean axial length (AL) was 22.29 mm (SD 0.73). The overall prevalence of myopia and astigmatism was 3.7% and 18.3%, respectively. No difference in prevalence of astigmatism was found across age groups. There was a statistically significant association between lower cylindrical diopters and higher spherical diopters (Spearman’s correlation: −0.21, P<0.001). Conclusion. Chinese children aged 3 to 6 years in the Shanghai area were mostly mildly hyperopic, with a low prevalence of myopia. Refractive astigmatism for children may be relatively stable throughout the preschool stage. Astigmatism was significantly associated with refractive error.

scholarly journals Test-Retest Reliability of the King-Devick Test in an Adolescent Population

2017 ◽  
Vol 52 (5) ◽  
pp. 439-445 ◽  
Author(s):  
Tyler J. Oberlander ◽  
Bernadette L. Olson ◽  
Lee Weidauer
Keyword(s):  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Testing Time ◽  
Cross Sectional ◽  
Healthy Adolescent ◽  
Retest Reliability ◽  
Intraclass Correlation Coefficients ◽  
Adolescent Population ◽  
Test Retest Reliability

Context:  The King-Devick (KD) test is a screening tool designed to assess cognitive visual impairments, namely saccadic rhythm, postconcussion. Test-retest reliability of the KD in a healthy adolescent population has not yet been established. Objective:  To investigate the overall test-retest reliability of the KD among a sample of healthy adolescents. Additionally, we sought to determine if sex and age influenced reliability. Design:  Cross-sectional study. Setting:  Secondary school. Patients or Other Participants:  Sixty-eight healthy adolescents, 41 boys (age = 15.4 ± 1.9 years) and 27 girls (age = 15.4 ± 1.9 years). Main Outcome Measure(s):  Participants completed the KD (version 1) at 3 testing sessions (days 1, 30, and 45) following standard instructions. We recorded total time to complete the reading of 3 cards for each participant during each testing session. Two-way random-effects intraclass correlation coefficients (ICCs) using single measurements repeated over time and repeatability coefficients were calculated. Linear mixed models were used to determine whether differences existed at each testing time and to examine whether changes that took place among visits were different by sex or age. Results:  Adolescents who completed the KD demonstrated acceptable reliability (ICC = 0.81; 95% confidence interval = 0.73, 0.87); however, the repeatability coefficient was large (±8.76 seconds). The sample demonstrated improvements between visits 1 and 2 (mean ± standard error = 4.3 ± 0.5 seconds, P &lt; .001) and between visits 2 and 3 (2.4 ± 0.5 seconds, P &lt; .001) for a total improvement of 6.9 seconds over 3 tests. No significant visit-by-sex or visit-by-age interactions were observed. Conclusions:  Despite the ICC being clinically acceptable, providers using the KD test for serial assessment of concussion in adolescents should be cautious in interpreting the results due to a large learning effect. Incorporating multiple measures can ensure accurate detection of sport concussion.

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