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Table 3 Instruments and schedule of assessments

From: A telephonic mindfulness-based intervention for persons with sickle cell disease: study protocol for a randomized controlled trial

Instrument

Abbreviation

Domain

Scale/subscale reliability (Cronbach’s α)

Interpretationa

Baseline

Week 1

Week 3

Week 6

Demographic Questionnaire

DEMO

Sociodemographic and clinical characteristics

N/A

N/A

X

   

Pain Catastrophizing Scale

PCS

Pain catastrophizingb

Total score 0.75

Rumination 0.87

Magnification 0.60

Helplessness 0.79

Low

X

X

X

X

Brief Pain Inventory

BPI

Pain interference and severity

Interference 0.89–0.92

Severity 0.80–0.87

Low

X

X

X

X

Patient Health Questionnaire–9 items

PHQ-9

Depression

Total score 0.87

Low

X

X

X

X

Patient-Reported Outcome Measurement Information System

PROMIS

Physical and psychological health

Mental and physical 0.73–0.96

High

X

X

X

X

Mindful Awareness Attention Scale

MAAS

Mindfulness

Total score 0.87

High

X

X

X

X

  1. N/A Not applicable
  2. This table provides the list of questionnaires that will be administered to study participants. Additionally, this table provides details related to when each questionnaire will be administered; the questionnaire’s abbreviation, domain, and psychometrics; and how the questionnaire should be interpreted
  3. aScores representing “improved” functional health status
  4. bPrimary outcome