Comparison of Anterior Corneal Curvature Measurements Using a Galilei Dual Scheimpflug Analyzer and Topcon Auto Kerato-Refractometer

Purpose. To compare anterior corneal keratometry (K) measurements taken by a dual Scheimpflug analyzer and an auto kerato-refractometer.Methods. Sixty-four normal eyes underwent keratometric measurements with both devices. The repeatability of the auto kerato-refractometer measurements was assessed by calculating the coefficient of variation (COV). The interdevice agreement was evaluated using the Bland-Altman analysis, Pearson correlation coefficient, and paired two-tailedt-test.Results. The COV of the flatKand steepKmeasurements taken by the auto kerato-refractometer were 0.21% and 0.29%, respectively. There were no significant differences between the steepKand averageKmeasurements for the Topcon and Galilei devices (P= 0.475, andP= 0.137, resp.). The Galilei flatKvalues were lower than those of the Topcon (P= 0.002). Both of the instruments showed good agreement for all anterior corneal keratometric values. There was a significant linear correlation between the Galilei and Topcon devices for the flatK(r= 0.989,P< 0.0001), steepK(r= 0.987,P< 0.0001), and averageKvalues (r= 0.994,P< 0.0001).Conclusions. The anterior corneal flat keratometric values were not interchangeable between the Galilei and Topcon devices. However, the measurements of the two instruments showed significant linear correlation with each other.

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Should CD138 Immunohistochemistry be Standard Recommended Practice for Bone Marrow Evaluation of Plasma Cell Neoplasms?

American Journal of Clinical Pathology ◽

10.1093/ajcp/aqaa161.241 ◽

2020 ◽

Vol 154 (Supplement_1) ◽

pp. S110-S110

Author(s):

A Vijayanarayanan ◽

K Inamdar ◽

M Menon ◽

P Kuriakose

Keyword(s):

Bone Marrow ◽

Plasma Cell ◽

Linear Correlation ◽

Plasma Cells ◽

Pearson Correlation ◽

Protein Electrophoresis ◽

Pearson Correlation Coefficient ◽

Cell Percentage ◽

Significant Linear Correlation ◽

Plasma Cell Neoplasms

Abstract Introduction/Objective Myeloma diagnosis by a pathologist requires 10% plasma cells (PC) or a biopsy proven plasmacytoma in addition to myeloma defining events. PC% > 60% is a biomarker of malignancy under this definition. WHO allows for assesment of plasma cell percentage either by aspirate count or by CD138 immunohistochemistry (IHC). There is lack of consensus on aspirate smear adequacy for PC% estimation. Uneven distribution of plasma cells, hemodilution and/or patchy infiltration can lead to gross underestimation. We compared PC% by aspirate count and CD138 IHC and established corelation with serum protein electrophoresis (SPEP) values. Methods 67 myeloma cases were included after excluding cases with suboptimal or inadequate aspirate smears. Two hematopathologists evaluated the diagnostic marrow (therapy naive) for PC% by aspirate count and CD138 IHC on biopsy/clot section. Corresponding SPEP and Free light chain (FLC) values were obtained. Correlation coefficent was calculated using Pearson correlation coefficient (GraphPad Prism). Results The Ig subtypes included IgG (41/67) and IgA (17/67). 12 cases had available FLC values. Both average and median PC% by CD138 IHC was considerably higher (50%, 52%) compared to aspirate count (29%, 21%). However, PC% by aspirate smear count and CD138 IHC demonstrated a significant linear correlation (r=0.71, p60% by CD138 (and not by aspirate count). Conclusion CD138 IHC based PC% is consistently higher, nevertheless, statistically significant linear corelation is observed between aspirate count PC% and CD138 IHC. A significant linear correlation is observed between CD138 IHC and SPEP (IgG and IgA), however, no such correlation is observed with aspirate count. More cases were diagnosed as myeloma (11%) and higher propotion of cases (35%) had biomarker of malignancy i.e. PC% >60% by CD138 IHC. Based on these findings, we propose estimation of PC% by CD138 immunostain be a recommended standard practice for better clinicopathologic and biologic correlation.

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Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation

Journal of Ophthalmology ◽

10.1155/2019/1964107 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7

Author(s):

Mahmoud Rateb ◽

Mahmoud Abdel-Radi ◽

Zeiad Eldaly ◽

Mohamed Nagy Elmohamady ◽

Asaad Noor El Din

Keyword(s):

Central Corneal Thickness ◽

Pearson Correlation ◽

Corneal Thickness ◽

Altman Analysis ◽

Bland Altman Analysis ◽

Rebound Tonometer ◽

Goldmann Applanation Tonometer ◽

Significant Difference ◽

Applanation Tonometer ◽

Icare Rebound Tonometer

Purpose. To evaluate the different IOP readings by Goldmann applanation tonometer (GAT), ICare rebound tonometer, and Tono-Pen in keratoconus patients after MyoRing implantation. To assess the influence of central corneal thickness (CCT) and thinnest corneal location (TCL) on IOP measurements by different tonometers. Setting. Prospective observational study was conducted in two private centers in Egypt from February 2015 to November 2016. Methods. Seventeen eyes of 10 patients suffering from keratoconus and who underwent MyoRing implantation were recruited. All subjects underwent GAT, ICare, and Tono-Pen IOP measurements in random order. Central corneal thickness and thinnest corneal location were assessed by Pentacam. Difference in mean in IOP readings was assessed by T-test. Correlation between each pair of devices was evaluated by Pearson correlation coefficient. The Bland–Altman analysis was used to assess intertonometer agreement. Results. Seventeen eyes (10 patients) were evaluated. The mean IOP reading was 13.9 ± 3.68, 12.41 ± 2.87, and 14.29 ± 1.31 mmHg in GAT, ICare, and Tono-Pen group, respectively. There was a significant difference between IOP readings by GAT/ICare and Tono-Pen/ICare (p value: 0.032 and 0.002, respectively) with no significant difference between GAT/Tono-Pen (p value: 0.554). Mean difference in IOP measurements between GAT/ICare was 1.49 ± 2.61 mmHg, Tono-Pen/ICare was 1.89 ± 2.15 mmHg, and GAT/Tono-Pen was −0.39 ± 2.59 mmHg. There was no significant correlation between the difference in IOP readings among any pair of devices and CCC or TCL. The Bland–Altman analysis showed a reasonable agreement between any pair of tonometers.

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LUTS-V: A New Simplified Score for Assessing Lower Urinary Tract Symptoms in Men

10.1101/2020.05.05.20091835 ◽

2020 ◽

Author(s):

Caroline Santos Silva ◽

Ueslei Menezes de Araujo ◽

Mateus Andrade Alvaia ◽

Kátia Santana Freitas ◽

Cristiano Mendes Gomes ◽

...

Keyword(s):

Diagnostic Accuracy ◽

Roc Curve ◽

Predictive Value ◽

Altman Analysis ◽

Predictive Values ◽

Bland Altman Analysis ◽

Discriminating Power ◽

Urinary Tract Symptoms ◽

Sensitivity Specificity ◽

Good Agreement

ABSTRACTOBJECTIVETo validate a new simplified score for the assessment of men with LUTS (LUTS-V).METHODSWe made adjustments to the VPSS, resulting in a new simplified instrument (LUTS visual score – LUTS-V). In a pilot study, LUTS-V was administered to 50 men to identify interpretation issues. We used the International Prostate Symptom Score (IPSS) as the gold standard to validate the new tool in 306 men. The total IPSS and LUTS-V scores for each subject were evaluated and we used Bland-Altman analysis and Pearson’s correlation plot to assess the agreement between the scores. A ROC curve was utilized to determine the diagnostic accuracy of LUTS-V and its diagnostic properties were described in terms of sensitivity, specificity, positive and negative predictive values.RESULTSMedian age was 59 [52-67] years and, according to the IPSS, 26 (8.7%) patients had severe symptoms, while 99 (33%) had moderate symptoms, and 175 (58.3%) had mild symptoms. We found a positive correlation between the IPSS and LUTS-V (r = 0.72; p < 0.0001). Bland-Altman analysis showed good agreement between the two questionnaires. We found LUTS-V to have a diagnostic accuracy to detect more severe cases of 83% (95% CI: [78-87%]; p < 0.001), as estimated by the area under the ROC curve. The cut-off value of ≥ 4 points was the best threshold, with a sensitivity of 74% and a specificity of 78%, which resulted in a negative predictive value of 81% and a positive predictive value of 71% in this scenario. Median completion time was 0.51 [0.41-1.07] min for LUTS-V and 2.5 [2.2-3.4] min for the IPSS (p < 0.0001). In addition, 91.5% of patients completed the questionnaires with no help, while the other 8.5% were interviewed.CONCLUSIONLUTS-V is a simple, self-administered tool with a significant discriminating power to identify patients with moderate to severe symptoms.

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Comparison between radial artery tonometry pulse analyzer and pulsed-Doppler echocardiography derived hemodynamic parameters in cardiac surgery patients: a pilot study

PeerJ ◽

10.7717/peerj.4132 ◽

2017 ◽

Vol 5 ◽

pp. e4132 ◽

Cited By ~ 9

Author(s):

Rashad Zayat ◽

Andreas Goetzenich ◽

Ju-Yeon Lee ◽

HeeJung Kang ◽

So-Hyun Jansen-Park ◽

...

Keyword(s):

Pilot Study ◽

Radial Artery ◽

Pearson Correlation ◽

Hemodynamic Parameters ◽

Altman Analysis ◽

Limits Of Agreement ◽

Bland Altman Analysis ◽

Number Of Patients ◽

The Mean ◽

Lower Limits

BackgroundBedside non-invasive techniques, such as radial artery tonometry, to estimate hemodynamic parameters have gained increased relevance as an attractive alternative and efficient method to measure hemodynamics in outpatient departments. For our pilot study, we sought to compare cardiac output (CO), and stroke volume (SV) estimated from a radial artery tonometry blood pressure pulse analyzer (BPPA) (DMP-Life, DAEYOMEDI Co., Gyeonggi-do, South Korea) to pulsed-wave Doppler (PWD) echocardiography derived parameters.MethodsFrom January 2015 to December 2016, all patients scheduled for coronary artery bypass (CABG) surgery at our department were screened. Exclusion criteria were, inter alia, moderate to severe aortic- or Mitral valve disease and peripheral arterial disease (PAD) > stage II. One hundred and seven patients were included (mean age 66.1 ± 9.9, 15 females, mean BMI 27.2 ± 4.1 kg/m2). All patients had pre-operative transthoracic echocardiography (TTE). We measured the hemodynamic parameters with the BPPA from the radial artery, randomly before or after TTE. For the comparison between the measurement methods we used the Bland-Altman test and Pearson correlation.ResultsMean TTE-CO was 5.1 ± 0.96 L/min, and the mean BPPA-CO was 5.2 ± 0.85 L/min. The Bland-Altman analysis for CO revealed a bias of −0.13 L/min and SD of 0.90 L/min with upper and lower limits of agreement of −1.91 and +1.64 L/min. The correlation of CO measurements between DMP-life and TTE was poor (r = 0.501,p < 0.0001). The mean TTE-SV was 71.3 ± 16.2 mL and the mean BPPA-SV was 73.8 ± 19.2 mL. SV measurements correlated very well between the two methods (r = 0.900,p < 0.0001). The Bland-Altman analysis for SV revealed a bias of −2.54 mL and SD of ±8.42 mL and upper and lower limits of agreement of −19.05 and +13.96 mL, respectively.ConclusionOur study shows for the first time that the DMP-life tonometry device measures SV and CO with reasonable accuracy and precision of agreement compared with TTE in preoperative cardiothoracic surgery patients. Tonometry BPPA are relatively quick and simple measuring devices, which facilitate the collection of cardiac and hemodynamic information. Further studies with a larger number of patients and with repeated measurements are in progress to test the reliability and repeatability of DMP-Life system.

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Comparison of reliability of measurements among fetal facial profile parameters by operators with different levels of experience at 15-23 weeks of gestation

10.21203/rs.3.rs-39843/v1 ◽

2020 ◽

Author(s):

Chitkasaem Suwanrath ◽

Rapphon Sawaddisan ◽

Pitchaya Booncharoen

Keyword(s):

Observational Study ◽

Gestational Age ◽

Intraclass Correlation ◽

The Other ◽

Altman Analysis ◽

Facial Profile ◽

Bland Altman Analysis ◽

Mandible Length ◽

Different Levels ◽

Good Agreement

Abstract Background Mandible anomalies are associated with many syndromes. Various methods have been proposed to assess fetal mandibles with different reliability. This study aimed to compare the reliability of measurements among five fetal facial profile parameters by operators with different levels of experience, at 15–23 weeks of gestation in Thai fetuses. Methods An observational study was prospectively conducted. The inferior facial angle (IFA), anteroposterior mandibular diameter (APD), mandible width (MD), maxilla width (MX) and mandible length (ML) were measured in 123 normal fetuses, using 2D ultrasonography, by 3 operators with different levels of experience. Each participant was examined by 2 operators. Each operator performed three independent measurements for each parameter and was blinded to the results of the other. Reliability of measurement was evaluated using intraclass correlation coefficient for both intraobserver and interobserver variabilities. Bland-Altman analysis was used to evaluate the agreement between operators’ measurements. Results The success rate of ML measurement was highest (100%) among the five parameters for all operators. Failure of MX measurement was high in fetuses at a gestational age of less than 18 weeks. Intraobserver variabilities of APD, MD, MX and ML measurements were excellent for all operators (ICC 0.958–0.986), while those of IFA measurement was moderate to excellent (0.560–0.923), depending on the operators’ experience. Interobserver variabilities varied between pairs of operators; only 2 parameters, APD and ML, showed excellent interobserver variabilities for both pairs of operators (ICC > 0.9) with good agreement. Interobserver variabilities of MX measurements for both pairs of operators were good (ICC 0.606–0.709), while MD was excellent for operator 1 and 2 (ICC 0.867), but moderate for operator 1 and 3 (ICC 0.576) and IFA was good for operator 1 and 2 (ICC 0.602), but poor for operator 1 and 3 (ICC 0.128). Conclusions The reliability of ML measurement was the highest, followed by APD, while IFA was the lowest, among the 5 parameters. ML and APD measurements were feasible and reproducible, whereas MX measurement was limited in fetuses with a gestational age of less than 18 weeks. Additionally, reliability of IFA measurement depended on the operator’s experience.

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The TRUTH confirmed: validation of an intraindividual comparison of gadobutrol and gadoteridol for imaging of glioblastoma using quantitative enhancement analysis

European Radiology Experimental ◽

10.1186/s41747-021-00240-2 ◽

2021 ◽

Vol 5 (1) ◽

Author(s):

Matthew J. Kuhn ◽

Julia W. Patriarche ◽

Douglas Patriarche ◽

Miles A. Kirchin ◽

Massimo Bona ◽

...

Keyword(s):

Pearson Correlation ◽

Linear Regression Analysis ◽

Region Of Interest ◽

Mean Difference ◽

Altman Analysis ◽

Double Blind ◽

Bland Altman Analysis ◽

Intraindividual Comparison ◽

Contrast Enhanced ◽

Magnetic Resonance Imaging Mri

Abstract Background Previous intraindividual comparative studies evaluating gadobutrol and gadoteridol for contrast-enhanced magnetic resonance imaging (MRI) of brain tumours have relied on subjective image assessment, potentially leading to misleading conclusions. We used artificial intelligence algorithms to objectively compare the enhancement achieved with these contrast agents in glioblastoma patients. Methods Twenty-seven patients from a prior study who received identical doses of 0.1 mmol/kg gadobutrol and gadoteridol (with appropriate washout in between) were evaluated. Quantitative enhancement (QE) maps of the normalised enhancement of voxels, derived from computations based on the comparison of contrast-enhanced T1-weighted images relative to the harmonised intensity on unenhanced T1-weighted images, were compared. Bland-Altman analysis, linear regression analysis and Pearson correlation coefficient (r) determination were performed to compare net QE and per-region of interest (per-ROI) average QE (net QE divided by the number of voxels). Results No significant differences were observed for comparisons performed on net QE (mean difference -24.37 ± 620.8, p = 0.840, r = 0.989) or per-ROI average QE (0.0043 ± 0.0218, p = 0.313, r = 0.958). Bland-Altman analysis revealed better per-ROI average QE for gadoteridol-enhanced MRI in 19/27 (70.4%) patients although the mean difference (0.0043) was close to zero indicating high concordance and the absence of fixed bias. Conclusions The enhancement of glioblastoma achieved with gadoteridol and gadobutrol at 0.1 mmol/kg bodyweight is similar indicating that these agents have similar contrast efficacy and can be used interchangeably, confirming the results of a prior double-blind, randomised, intraindividual, crossover study.

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Modified Pearson Correlation Coefficient for Two-color Imaging in Spherocylindrical Cells

10.1101/300517 ◽

2018 ◽

Author(s):

Sonisilpa Mohapatra ◽

James C. Weisshaar

Keyword(s):

Correlation Coefficient ◽

Linear Correlation ◽

Pearson Correlation ◽

Three Dimensional ◽

Mean Value ◽

Pearson Correlation Coefficient ◽

Bacterial Cells ◽

Cell Geometry ◽

Cell Shapes ◽

Special Case

AbstractThe revolution in fluorescence microscopy enables sub-diffraction-limit (“superresolution”) localization of hundreds or thousands of copies of two differently labeled proteins in the same live cell. In typical experiments, fluorescence from the entire three-dimensional (3D) cell body is projected along the z-axis of the microscope to form a 2D image at the camera plane. For imaging of two different species, here denoted “red” and “green”, a significant biological question is the extent to which the red and green spatial distributions are positively correlated, anti-correlated, or uncorrelated. A commonly used statistic for assessing the degree of linear correlation between two image matrices R and G is the Pearson Correlation Coefficient (PCC). PCC should vary from –1 (perfect anti-correlation) to 0 (no linear correlation) to +1 (perfect positive correlation). However, in the special case of spherocylindrical bacterial cells such as E. coli or B. subtilis, we show that the PCC fails both qualitatively and quantitatively. PCC returns the same +1 value for 2D projections of distributions that are either perfectly correlated in 3D or completely uncorrelated in 3D. The PCC also systematically underestimates the degree of anti-correlation between the projections of two perfectly anti-correlated 3D distributions. The problem is that the projection of a random spatial distribution within the 3D spherocylinder is non-random in 2D, whereas PCC compares every matrix element of R or G with the constant mean value R or G. We propose a modified Pearson Correlation Coefficient (MPCC) that corrects this problem for spherocylindrical cell geometry by using the proper reference matrix for comparison with R and G. Correct behavior of MPCC is confirmed for a variety of numerical simulations and on experimental distributions of HU and RNA polymerase in live E. coli cells. The MPCC concept should be generalizable to other cell shapes.

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HOUT-07. ASSOCIATION BETWEEN BASELINE BODY MASS INDEX (BMI) AND OUTCOMES FOR PATIENTS WITH GLIOBLASTOMA

Neuro-Oncology ◽

10.1093/neuonc/noz175.472 ◽

2019 ◽

Vol 21 (Supplement_6) ◽

pp. vi113-vi113

Author(s):

Jessica Chew ◽

Olivier Morin ◽

Steve Braunstein

Keyword(s):

Body Mass Index ◽

Body Mass ◽

Linear Correlation ◽

Pearson Correlation ◽

Baseline Body Mass Index ◽

Single Institution ◽

Cox Proportional Hazard ◽

Significant Linear Correlation ◽

Strong Linear Correlation

Abstract OBJECTIVES This single institution retrospective study aims to evaluate the association between body mass index (BMI) and survival in glioblastoma (GBM). METHODS Patients were identified using a single institution cancer registry. Baseline height and weight were obtained at first clinical visit after diagnosis. Inclusion criteria were GBM diagnosis after 1999 with available height and weight data. Follow up was through July 2018. RESULTS 779 patients were included who had available BMI data. Median age was 58 (IQR 48–66). 38% of patients were female and 62% were male. Median overall survival (OS) was 1.34 years (IQR 0.78–2.12) and median BMI was 26.01 (IQR 23.3–29.1). There was no strong linear correlation between OS and BMI using Pearson correlation (r=0.045). Patients with higher BMI had significantly improved OS when comparing the top 50% to bottom 50% (2.20 vs 1.89 years, p=0.03) and top 25% to bottom 25% (2.25 vs 1.84 years, p=0.03). When comparing patients classified as overweight or obese (BMI >/= 25) to those within normal range or below (BMI < 25), there was a trend towards increased OS (2.14 vs 1.90 years, p=0.075). There was no significant trend for BMI when comparing patients with higher OS with lower OS. There was also no significance for BMI on Cox proportional hazard multivariate analysis. CONCLUSIONS There was no significant linear correlation between BMI and survival for GBM patients, although there appears to be statistically significant improved survival benefit for patients with higher BMI compared to patients with lower BMI. Further investigation is warranted to explore this finding and if BMI could be used as a potential prognostic marker for GBM.

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PENGUKURAN JUMLAH LIMFOSIT CD4 METODE PANLEUCOGATING PADA PASIEN TERINFEKSI HUMAN IMMUNODEFICIENCY VIRUS (HIV)

INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY ◽

10.24293/ijcpml.v19i3.420 ◽

2016 ◽

Vol 19 (3) ◽

pp. 190

Author(s):

Umi S. Intansari ◽

Budi Mulyono ◽

Usi Sukorini

Keyword(s):

Flow Cytometric Analysis ◽

Clinical Pathology ◽

Cross Sectional Study ◽

Altman Analysis ◽

Cross Sectional ◽

Bland Altman Analysis ◽

Flow Cytometric ◽

Percentage Difference ◽

Immunodeficiency Virus ◽

Good Agreement

The standard method for absolute lymphocyte CD4 count is by the use of flow cytometric analysis, but due to the high costly matter,a simpler method and less costly fee of PanLeucogating dual platform is needed. The aim of this study is to know how to replace the single platform by PanLeucogating dual platform by determining the agreement between both methods and to test the proportion of patient who have CD4 <200 cell/ul measured by PanLeucogating and single platform method. A cross sectional study was carried out in the Departement of Clinical Pathology Faculty of Medicine Gadjah Mada University Yogyakarta. The inclusion criteria of the study are HIV/AIDS patients who their CD4 were measured. Absolute count of CD4 was using FACS Calibur measured with both PanLeucogating and single platform method. The bias, correlation, regression and limit of agreement between both methods were analyzed using Bland Altman analysis to decide whether the two methods are interchangeable. The result of the study revealed an excellent correlation between the two methods (r=0.996; y=- 0.906 + 0.0.987). Bland Altman analysis revealed bias=5 cells/uL; standard deviation=18.7 and Limit of agreement (LOA)=-31.6 – 40.75. The Mean Percentage Difference (MPD)=2%; dan%LOA=-7.96 – 12.5%. PanLeucogating method has a good agreement with the single platform method and can be used interchangeable. There was no difference of the proportion of patient who has CD4 <200 cell/ul measured by Panleucogating method and single platform.

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Evaluation of a Novel WeChat Applet for Image-Based Dietary Assessment among Pregnant Women in China

Nutrients ◽

10.3390/nu13093158 ◽

2021 ◽

Vol 13 (9) ◽

pp. 3158

Author(s):

Ye Ding ◽

Xiaolong Lu ◽

Zhencheng Xie ◽

Tingting Jiang ◽

Chenglin Song ◽

...

Keyword(s):

Antenatal Care ◽

Pregnant Women ◽

Pearson Correlation ◽

Dietary Assessment ◽

Horizontal Line ◽

Altman Analysis ◽

Positive Role ◽

Bland Altman Analysis ◽

Recall Method ◽

Weighing Method

As an important part of antenatal care for pregnant women in China, dietary assessment plays a positive role in maternal and fetal health. Shortcomings in the associated methodologies require improvement. Our purpose was to develop a novel WeChat Applet for image-based dietary assessment (WAIDA) and evaluate its relative validity among pregnant women in China. Data on 251 lunch meals of pregnant women in their second trimester were analyzed. The differences in food weight, energy, and nutrient estimates by the dietary recall or WAIDA method with the weighing method were compared using paired t-tests. Pearson correlation coefficients were used to analyze the correlation between food weight, energy, and nutrient intake obtained from the recall or WAIDA method and those obtained from the weighing method. The Bland–Altman analysis was used to examine the agreement between the recall or WAIDA method and the weighing method for energy and nutrients. Compared with the weighing method, the variation range of food weight, energy and nutrients estimated by the WAIDA method was smaller and more stable than that estimated by the recall method. Compared with the recall method, the correlations suggested a better relationship between the energy and nutrient intakes from the weighing method and those estimated by the WAIDA method (0.752–0.970 vs. 0.480–0.887), which were similar to those of food weight (0.332–0.973 vs. −0.019–0.794). The Bland-Altman analysis showed that the mean differences of the energy and nutrients estimated from the recall method were further away from zero relative to the weighing method compared to the WAIDA method and with numerically wider 95% confidence intervals. The spans between the upper and lower 95% limit of agreement (LOAs) of the energy and nutrients obtained by the WAIDA method were narrower than those obtained by the recall method, and the majority of the data points obtained by the WAIDA method lay between the LOAs, closer to the middle horizontal line. Compared with the recall method, the WAIDA method is consistent with the weighing method, close to the real value of dietary data, and expected to be suitable for dietary assessment in antenatal care.

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