SUMMARY INDEX OF KNOWN PROVENANCES

Abstract Purpose To assess the test–retest reliability of the EQ-5D-5L and the reworded Quality of Life After Traumatic Brain Injury Overall Scale (QOLIBRI-OS) for the general population of Italy, the Netherlands, and the United Kingdom (UK). Methods The sample contains 1864 members of the general population (aged 18–75 years) of Italy, the Netherlands, and the UK who completed a web-based questionnaire at two consecutive time points. The survey included items on gender, age, level of education, occupational status, household annual income, chronic health status, and the EQ-5D-5L and reworded QOLIBRI-OS instrument. Test–retest reliability of the EQ-5D-5L dimensions, EQ-5D-5L summary index, EQ VAS, reworded QOLIBRI-OS dimensions and reworded QOLIBRI-OS level sum score was examined by Gwet’s Agreement Coefficient (Gwet’s AC) and Intraclass Correlation Coefficient (ICC). Results Gwet’s AC ranged from 0.64 to 0.97 for EQ-5D-5L dimensions. The ICC ranged from 0.73 to 0.84 for the EQ-5D-5L summary index and 0.61 to 0.68 for EQ VAS in the three countries. Gwet’s AC ranged from 0.35 to 0.55 for reworded QOLIBRI-OS dimensions in the three countries. The ICC ranged from 0.69 to 0.77 for reworded QOLIBRI-OS level sum score. Conclusion Test–retest reliability of the EQ-5D-5L administered via a web-based questionnaire was substantial to almost perfect for the EQ-5D-5L dimensions, good for EQ-5D-5L summary index, and moderate for the EQ VAS. However, test–retest reliability was less satisfactory for the reworded QOLIBRI-OS. This indicates that the web-based EQ-5D-5L is a reliable instrument for the general population, but further research of the reworded QOLIBRI-OS is required.

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Constructing a summary index using the standardized inverse-covariance weighted average of indicators

The Stata Journal Promoting communications on statistics and Stata ◽

10.1177/1536867x20976325 ◽

2020 ◽

Vol 20 (4) ◽

pp. 952-964

Author(s):

Benjamin Schwab ◽

Sarah Janzen ◽

Nicholas P. Magnan ◽

William M. Thompson

Keyword(s):

Least Squares Method ◽

Weighted Average ◽

Generalized Least Squares ◽

American Statistical Association ◽

Cash Transfer ◽

Transfer Program ◽

Statistical Association ◽

Generalized Least Squares Method ◽

Summary Index ◽

The Relationship

Researchers often want to examine the relationship between a variable of interest and multiple related outcomes. To avoid problems of inference that arise from testing multiple hypotheses, one can create a summary index of the outcomes. Summary indices facilitate generalizing findings and can be more powerful than individual tests. In this article, we introduce a command, swindex, that implements the generalized least-squares method of index construction proposed by Anderson (2008, Journal of the American Statistical Association 103: 1481–1495). We describe the command and its options and provide an example based on Blattman, Fiala, and Martinez’s (2014, Quarterly Journal of Economics 129: 697–752) evaluation of a cash transfer program in Uganda.

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A summary index for antimicrobial resistance in food animals in the Netherlands

BMC Veterinary Research ◽

10.1186/s12917-017-1216-z ◽

2017 ◽

Vol 13 (1) ◽

Cited By ~ 2

Author(s):

Arie H. Havelaar ◽

Haitske Graveland ◽

Jan van de Kassteele ◽

Tizza P. Zomer ◽

Kees Veldman ◽

...

Keyword(s):

Antimicrobial Resistance ◽

The Netherlands ◽

Summary Index ◽

Food Animals

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Neuropsychological performance of adults with attention deficit hyperactivity disorder (ADHD): Diagnostic classification estimates for measures of frontal lobe/executive functioning

Journal of the International Neuropsychological Society ◽

10.1017/s1355617799533055 ◽

1999 ◽

Vol 5 (3) ◽

pp. 222-233 ◽

Cited By ~ 88

Author(s):

DAVID W. LOVEJOY ◽

J.D. BALL ◽

MATTHEW KEATS ◽

MICHAEL L. STUTTS ◽

EDWARD H. SPAIN ◽

...

Keyword(s):

Executive Functioning ◽

Frontal Lobe ◽

Classification Accuracy ◽

Predictive Power ◽

Diagnostic Classification ◽

Neuropsychological Measures ◽

Hyperactivity Disorder ◽

Good Classification ◽

Summary Index ◽

Normal Controls

ADHD adults (N = 26) were compared to normal controls (N = 26) on 6 neuropsychological measures believed sensitive to frontal lobe–executive functioning. MANOVA analyses and subsequent univariate tests indicated that most of the neuropsychological measures discriminated between the two groups. To address clinical significance, diagnostic classification rates were also generated for each measure individually, and for the battery as a whole. Levels of positive predictive power (PPP) for each of the 6 measures (83–100%) indicated that abnormal scores on these tests were good predictors of ADHD. However, estimates of negative predictive power (NPP) suggested that normal scores poorly predicted the absence of ADHD. When classification rates were calculated for the overall battery classification accuracy improved substantially. Thus, neuropsychological tests can differentiate adults suffering from ADHD from adults without ADHD, while also providing good classification accuracy. Finally, the pattern of neurobehavioral impairments exemplified through the Summary Index scores was interpreted as consistent with conceptualizations of ADHD depicting mild neurologic dysfunction in networks associated with the frontal lobes. (JINS, 1999, 5, 222–233.)

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Influence of motor impairment on exercise capacity and quality of life in patients with Parkinson disease

Journal of Exercise Rehabilitation ◽

10.12965/jer.2142290.145 ◽

2021 ◽

Vol 17 (4) ◽

pp. 241-246

Author(s):

Hélcio Kanegusuku ◽

Raphael M. Ritti-Dias ◽

Pâmela Yuki Igarasi Barbosa ◽

Erica Tardelli das Neves Guelfi ◽

Erika Okamoto ◽

...

Keyword(s):

Quality Of Life ◽

Parkinson Disease ◽

Healthy Subject ◽

Exercise Capacity ◽

Motor Impairment ◽

Stage Iv ◽

Summary Index ◽

The Impact ◽

Disease Questionnaire

This study evaluated the impact of motor impairment (MI) on exercise capacity and quality of life in patients with Parkinson disease (PD). One hundred ninety-two patients (≥50 years old) were divided according to the Hoehn and Yahr stages in: mild (stage I), mild to moderate (stage II), moderate (stage III), and advanced MI (stage IV). Exercise capacity (6-min walk test [6MWT]) and quality of life (Parkinson’s Disease Questionnaire [PDQ-39]) were obtained. In this context, 6MWT was progressively worse with increasing the severity of MI (P<0.01). Patients with advanced MI achieved 39% of predicted 6MWT of healthy subject, while subjects with mild MI achieved 83% of healthy subject (P<0.01). In addition, patients with advanced MI presented higher (i.e., worse) PDQ-39 scores in summary index, cognition, mobility and activities of daily live domains compared to other groups (P<0.01). Patients with moderate MI also presented worse scores in PDQ-39 summary index, mobility and activities of daily live domains in comparison with mild MI patients (P<0.01). Higher MI was correlated with worse exercise capacity (6MWT: r=-0.46, P<0.01), with worse PDQ-39 summary index and the mobility and activities of daily live domains scores (r=0.38, r=0.46, and r=0.43, P<0.01). In conclusion, MI is related to lower exercise capacity and quality of life (i.e., PDQ-39 summary index and mobility and activities of daily live domains) in patients with PD.

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