Common Metrics

Common Metrics

Developing and validating measurement models for multiple PROMs measuring the same PRO.

A common metric for self-reported severity of personality disorders

**Introduction:** Dimensional models of personality disorders (PD) in the DSM-5 and ICD-11 share a focus on impairments in self and interpersonal functioning to represent the general features and severity of PD. This new perspective has led to the …

Measuring fatigue in cancer patients: a common metric for six fatigue instruments

**Purpose:** Fatigue is one of the most disabling symptoms in cancer patients. Many instruments exist to measure fatigue. This variety impedes the comparison of data across studies or to the general population. We aimed to estimate a common metric …

Scoring Depression on a Common Metric: A Comparison of EAP Estimation, Plausible Value Imputation, and Full Bayesian IRT Modeling

There are a growing number of item response theory (IRT) studies that calibrate different patient-reported outcome (PRO) measures, such as anxiety, depression, physical function, and pain, on common, instrument-independent metrics. In the case of …

Validity of instrument-independent depression metrics – protocol for a meta-study

www.common-metrics.org: a web application to estimate scores from different patient-reported outcome measures on a common scale

**Background**: Recently, a growing number of Item-Response Theory (IRT) models has been published, which allow estimation of a common latent variable from data derived by different Patient Reported Outcomes (PROs). When using data from different …

Using PHQ-9 item parameters of a common metric resulted in similar depression scores compared to independent IRT model reestimation

Objectives To investigate the validity of a common depression metric in independent samples. Study Design and Setting We applied a common metrics approach based on item-response theory for measuring depression to four German-speaking samples that …

Standardization of depression measurement: a common metric was developed for 11 self-report depression measures

**Objectives:** To provide a standardized metric for the assessment of depression severity to enable comparability among results of established depression measures. **Study Design and Setting:** A common metric for 11 depression questionnaires was …

Impact of cross-calibration methods on the interpretation of a treatment comparison study using 2 depression scales.

Many questionnaires assessing depressive symptoms are available. Most of these questionnaires are constructed based on classical test theory, making comparisons of individual scores difficult. Item response theory (IRT) allows the comparison of …

How to compare scores from different depression scales: equating the Patient Health Questionnaire (PHQ) and the ICD-10-Symptom Rating (ISR) using Item Response Theory