Key Measurement and Feasibility Characteristics When Selecting Outcome Measures

Linking Intensive Care Unit functional scales to the International Classification of Functioning: proposal of a new assessment approach

BACKGROUND

There are several tools to assess functional and physical status in critical ill patients. These tools can guide rehabilitation strategies in Intensive care units (ICU). However, they are not standardized, and this can compromise their applicability. The aim of the study is to identify common contents between International Classification of Functioning, Disability and Health (ICF) and Medical Research Council sum score (MRC-ss), Functional Status Score for the ICU (FSS-ICU), and Physical Function in ICU Test-scored (PFIT-s). As well as to propose a new assessment approach based on the ICF to ICU patients.

METHODS

Pilot cross-sectional study. ICU in-patients, both genders, aged between 50 and 75 years were assessed with MRC-ss, FSS-ICU, PFIT-s and the linking rules used were proposed by Cieza et al. The inter-rater agreement for the linking process was performed using the Kappa coefficient.

RESULTS

The ICF categories identified in the tools covered a total of 14 items. Common contents were identified in 13 of the 14 and two were related to body functions, six to body structures and five to activities and participation. The inter-rater agreement was considered substantial for the linking of MRC-ss (k = 0.665) and PFIT-s (k = 0.749) to the ICF, and almost perfect for the FSS-ICU (k = 0.832).

CONCLUSIONS

This study synthesizes and categorizes commonly used tools and presents a new proposal based on the ICF to guide future studies. The proposed model combines the ICF with the contents of the most relevant instruments used in critical care.

Physiotherapists' and Physiotherapy Assistants' Perspectives on Using Three Physical Function Measures in the Intensive Care Unit: A Mixed-Methods Study

Purpose: We sought to understand physiotherapists' and physiotherapist assistants' perspectives on using three physical function measures in the intensive care unit (ICU) setting: the Activity Measure for Post-Acute Care Inpatient Mobility Short Form, the Johns Hopkins Highest Level of Mobility scale, and the Functional Status Score for the Intensive Care Unit. Method: A six-item questionnaire was developed and administered to physiotherapists and physiotherapist assistants working in adult ICUs at one U.S. teaching hospital. A single semi-structured focus group was conducted with seven physiotherapists, recruited using purposive sampling to include participants with a range of clinical experience. Results: Of 22 potential participants, 18 physiotherapists and 2 physiotherapist assistants completed the questionnaire. Seven physiotherapists participated in the focus group. The questionnaire found favourable perspectives on the use of the three physical function measures in clinical practice, and the focus group identified five themes related to clinicians' experience with using them: (1) ease of scoring, (2) usefulness in inter-professional communication, (3) general ease of use, (4) responsiveness to change in physical function, and (5) generalizability across patients. Conclusions: The most frequently discussed themes in this study were ease of scoring and usefulness in inter-professional communication, highlighting their importance in designing and selecting physical function measures for clinical use in the ICU setting.

Feasibility, Reliability, Responsiveness, and Validity of the Patient-Reported Functional Scale for the Intensive Care Unit: A Pilot Study

BACKGROUND

Although many performance-based measures assess patients' physical function in intensive care unit (ICU) survivors, to our knowledge, there are no patient-reported ICU rehabilitation-specific measures assessing function. We developed the Patient-Reported Functional Scale-ICU (PRFS-ICU), which measures patients' perceptions of their ability to perform 6 activities (rolling, sitting edge of bed, sit-to-stand and bed-to-chair transfers, ambulation, and stair climbing). Each item is scored from 0 (unable) to 10 (able to perform at pre-ICU level) to a maximum of 60.

OBJECTIVES

Estimate the feasibility, reliability, responsiveness, and validity of the PRFS-ICU.

METHODS

This was a substudy of TryCYCLE, a single-center, prospective cohort examining the safety and feasibility of early in-bed cycling with mechanically ventilated patients (NCT01885442). To determine feasibility, we calculated the number of patients with at least 1 PRFS-ICU assessment during their hospital stay. To assess reliability, 2 raters blinded to each other's assessments administered the PRFS-ICU within 24-hours of each other. We calculated the intraclass correlation coefficient (ICC; 95% confidence interval [CI]), standard error of measurement (SEM, 95% CI), and minimal detectable change (MDC₉₀). To assess validity, we estimated convergent validity of the PRFS-ICU with the Functional Status Score for ICU (FSS-ICU), Medical Research Council Sum Score (MRC-SS), Physical Function Test for ICU (PFIT-s), Katz Index of Independence in Activities of Daily Living (Katz ADLs), and a pooled index using Pearson's correlation coefficient (r, 95% CI).

RESULTS

Feasibility: 20 patients completed a PRFS-ICU assessment. Reliability and responsiveness: 16 patients contributed data. The ICC, SEM, and MDC₉₀ were 0.91 (0.76, 0.97), 4.75 (3.51, 7.35), and 11.04 points, respectively. Validity: 19 patients contributed data and correlations were (r [95% CI]): FSS-ICU (0.40 [-0.14, 0.76]), MRC-SS (0.51 [0.02, 0.80]), PFIT-s (0.43 [-0.13, 0.78]), Katz ADLs (0.53 [0.10, 0.79]), and pooled index (0.48 [-0.14, 0.82]).

CONCLUSIONS

Our pilot work suggests the PRFS-ICU may be a useful tool to assess and monitor patients' perceptions of function over time.

Development and prospective evaluation of CAPLET, a cancer ambulatory patient physical function longitudinal evaluation tool for routine clinical practice

PURPOSE

A patient's physical function is a critical outcome variable for measuring and improving chronic care management. However, patient-reported outcome measures of physical function are not routinely assessed in cancer outpatients, in part due to limitations of tools available. This study presents the development and evaluation of the Cancer Ambulatory Patient Physical Function Longitudinal Evaluation Tool (CAPLET) as an adaptive response tool for routinely screening for physical dysfunction in oncology clinical practice.

METHODS

In phase 1, 407 adult outpatients at Princess Margaret Cancer Centre completed the World Health Organization Disability Assessment Schedule (WHODAS) 2.0, Health Assessment Questionnaire Disability Index (HAQ-DI), EuroQuol-5D-3L ( EQ-5D-3L), and patient-reported outcome (PRO)-Eastern Cooperative Oncology Group (ECOG). CAPLET was developed based on a branching logic algorithm navigating patients to appropriate domains of HAQ-DI/WHOAS using their responses to the PRO-ECOG/EQ-5D-3L as screeners. Sensitivity/specificity of CAPLET screeners for HAQ-DI/WHODAS items were reported. In phase 2, CAPLET vs the WHODAS/HAQ-DI were alternatively administrated to 318 adult outpatients in a two-arm trial comparing time to completion and acceptability between the tools.

RESULTS

Using a patient's ECOG status and the sum of the mobility, self-care, and usual activity dimensions of the EQ-5D-3L to dichotomize patients as with or without difficulty, CAPLET achieved a sensitivity > 90% against recommended WHODAS and HAQ-DI cutoffs for significant dysfunction. Sensitivity of screeners for capturing dysfunction in individual WHODAS/HAQ-DI items ranged from 85 to 100%. Compared to the HAQ-DI/WHODAS, CAPLET was associated with a 50% reduction in administration times and improved patient acceptability, while reducing question burden by 84% for half the sample population.

CONCLUSIONS

CAPLET improves the feasibility of capturing detailed assessments of patient-reported physical function in cancer outpatients.