Michigan Hand Outcomes Questionnaire – Spanish Version

1. Abstract

Patient-reported outcome measures (PROMs) have emerged as an indispensable component of contemporary clinical research and orthopedic practice, shifting the evaluative paradigm from isolated biomechanical variables to the patient’s holistic subjective lived experience. The Michigan Hand Outcomes Questionnaire (MHQ), originally designed by Chung and colleagues in 1998, stands as a premier disease-specific instrument engineered to capture the multidimensional consequences of hand, wrist, and upper extremity pathologies. The questionnaire is distinguished by its bilateral functional assessment, evaluating both the right and left hands independently, and by its inclusion of psychosocial facets including aesthetic perception and overall functional satisfaction. The Spanish cross-cultural adaptation and psychometric validation (MHQ-Sp) conducted by Martínez-Fernández, Sarabia-Cobo, and Sánchez-Labraca provides Spanish-speaking clinicians with a methodologically sound and culturally adapted tool.

Evaluated under international consensus standards, including the COSMIN (COnsensus-based Standards for the selection of health Measurement INstruments) taxonomy, the MHQ-Sp comprises 37 items distributed across six latent domains: Overall Hand Function, Activities of Daily Living (ADL), Work Performance, Pain, Aesthetics, and Satisfaction with Hand Function. Responses are recorded on a five-point Likert scale and transformed linearly into a standardized metric ranging from 0 to 100, wherein higher scores denote superior functional status following pain domain inversion. Empirical validation in a sample of 262 patients undergoing orthopedic rehabilitation demonstrated strong internal consistency, with domain-level Cronbach’s alpha coefficients ranging between 0.82 and 0.85, robust test-retest reliability across a 10 to 15-day interval (intraclass correlation coefficients between 0.74 and 0.91), and minimal measurement error (standard error of measurement between 1.70 and 4.67). Construct validity was corroborated via robust negative correlations with the Disabilities of the Arm, Shoulder and Hand (DASH; r = -0.75) and its occupational module (r = -0.63), while discriminant validity was verified by negligible correlations with the generic EQ-5D (r = -0.01) and objective dynamometric grip strength (r = 0.05). Structural validity was corroborated through confirmatory factor analysis confirming subscale unidimensionality, and the minimal clinically important difference (MCID) was established at greater than 6.85 points.

2. Keywords

Patient-Reported Outcome Measures, Michigan Hand Outcomes Questionnaire, Psychometrics, Hand Injuries, Cross-Cultural Adaptation, Construct Validity, Orthopedic Rehabilitation, Health-Related Quality of Life, COSMIN Guidelines, Factor Analysis, Minimal Clinically Important Difference

3. Authors

The cross-cultural adaptation and psychometric validation of the Spanish version of the Michigan Hand Outcomes Questionnaire (MHQ-Sp) was executed by a multidisciplinary clinical research team:

• María Visitación Martínez-Fernández, PhD, PT: Department of Physiotherapy and Physical Medicine, Mutua Montañesa Hospital, Santander, Cantabria, Spain. Clinical specialist in upper extremity musculoskeletal trauma and occupational rehabilitation.
• Carmen María Sarabia-Cobo, PhD, RN: Department of Nursing, Faculty of Nursing, University of Cantabria, Santander, Spain; Health Research Institute Marqués de Valdecilla (IDIVAL). Corresponding author: [email protected]. Expert in health measurement scales, clinical methodology, and psychological assessment.
• Nuria Sánchez-Labraca, PhD, PT: Department of Nursing and Physiotherapy, Faculty of Health Sciences, University of Almería, Almería, Spain. Specialist in functional rehabilitation, neurorehabilitation, and psychometric validation methodologies.

4. Purpose

Musculoskeletal injuries and degenerative pathologies of the hand and wrist represent a substantial epidemiological burden globally, accounting for a high proportion of industrial accidents, work-related disability claims, and emergency orthopedic presentations. The human hand serves as the primary anatomical conduit for human-environment interaction, tool manipulation, fine motor coordination, non-verbal social communication, and tactile exploration. Consequently, anatomical disruptions resulting from distal radius fractures, flexor or extensor tendon ruptures, carpal tunnel syndrome, peripheral nerve lacerations, or basal thumb osteoarthritis produce far-reaching functional, psychological, and vocational ramifications.

Historically, orthopedic surgeons and rehabilitation physical therapists evaluated post-traumatic or post-surgical recovery relying almost entirely on objective physical impairment metrics, such as goniometric active range of motion (AROM), Jamar hydraulic dynamometer grip strength, pinch gauge measurements, and volumetric limb edema assessments. While these mechanical indices offer quantifiable physiological markers, empirical psychometric literature has demonstrated their poor correlation with the patient’s lived experience of disability, occupational performance, and overall quality of life. An individual demonstrating full articular arc of motion may continue to experience debilitating neuropathic pain, fear-avoidance kinesiology, or distress regarding visible cosmetic deformities, whereas another patient with marked structural limitation may achieve full vocational reintegration through compensatory strategies.

The development and validation of the Spanish version of the Michigan Hand Outcomes Questionnaire (MHQ-Sp) resolves a pronounced methodological limitation within Spanish-speaking healthcare and workers’ compensation ecosystems. Prior to this adaptation, Spanish practitioners frequently utilized regional upper-extremity measures, such as the Disabilities of the Arm, Shoulder and Hand (DASH) instrument. Although the DASH offers robust general measurement across the entire kinetic chain, its inability to differentiate between the dominant and non-dominant hand, or isolate hand-specific dexterity from proximal shoulder and elbow function, limits its clinical resolution. The MHQ-Sp addresses these gaps by isolating unilateral and bilateral hand functioning, capturing occupational role performance, and quantifying psychological dimensions such as appearance dissatisfaction and functional contentment. It serves both clinical trajectories—by providing a benchmark for longitudinal monitoring across physical therapy, surgical decision-making, and discharge readiness—and clinical trials by offering a responsive, standardized primary endpoint adhering to international psychometric criteria.

5. Psychological Construct

The Michigan Hand Outcomes Questionnaire conceptualizes upper extremity health status through a multidimensional, biopsychosocial lens. Health-related quality of life (HRQoL) specific to hand pathology is viewed not as a unitary construct, but as a composite network comprising six distinct, intercorrelated latent domains:

• Overall Hand Function: This dimension quantifies the patient’s subjective evaluation of physiological and functional competence across each hand independently. It addresses global utility, perceived sensory intactness (tactile discrimination, dysesthesia, numbness), articular mobility in the fingers and wrist, and self-appraised muscular force. Rather than recording kilograms of force or degrees of excursion, this scale captures the patient’s functional appraisal of how capable their hand feels during daily use.
• Activities of Daily Living (ADL): This subscale measures functional limitation and mechanical performance during discrete behavioral routines. The construct is bifurcated into bilateral and unilateral motor executions. Bilateral items assess complex dual-hand tasks requiring cooperative stabilization and manipulation, such as manipulating keys in a lock, handling a drinking glass, opening a doorknob, washing dishes, buttoning garments, typing/writing, and operating cutlery. The unilateral items assess distinct dexterity within each hand independently, permitting direct comparisons between injured and uninjured sides.
• Work Performance: This construct evaluates occupational interference, vocational strain, and productivity loss attributable specifically to the hand or wrist condition. Rooted in occupational psychology frameworks, this domain moves beyond binary employment status to assess performance decrements, such as decreased task speed, required structural modifications to work procedures, task restriction, and increased fatigue during occupational duties over the preceding week.
• Pain: The pain subscale captures the sensory, temporal, and disruptive characteristics of noxious physical symptoms. It evaluates average pain frequency, localized pain intensity (distinguishing right versus left hand/wrist), nocturnal sleep fragmentation caused by pain episodes, and interference with waking activities. In psychometric analysis, this scale addresses the affective and cognitive burden of pain rather than purely neurochemical nociception.
• Aesthetics: One of the defining characteristics of the MHQ framework is its formal inclusion of aesthetic perception. Severe hand injuries—such as replantations, severe burn contractures, open fractures, rheumatoid swan-neck deformities, or surgical scarring—frequently lead to altered body image and somatic dissatisfaction. This domain captures the patient’s subjective emotional reaction to, and contentment with, the external physical appearance of each hand, reflecting body image psychology in surgical contexts.
• Satisfaction with Hand Function: This dimension taps into the cognitive-evaluative appraisal of outcome, capturing the concordance between a patient’s pre-injury expectations and their current functional reality. Independent satisfaction scores are generated for each hand, reflecting psychological adjustment, acceptance of residual impairment, and personal contentment with functional capacity.

6. Theoretical Framework

The theoretical architecture underpinning the Michigan Hand Outcomes Questionnaire is rooted in the Biopsychosocial Model originally advanced by George Engel (1977), synthesized with the International Classification of Functioning, Disability and Health (ICF) framework codified by the World Health Organization (WHO, 2001). Under the classical biomedical model, disease, injury, and healing are conceptualized strictly as biomechanical disruptions: structural anatomical alignment, osseous union, tendon gliding, and mechanical torque generation. While biologically essential, this reductionist viewpoint fails to explain why individuals with identical radiographic outcomes or comparable goniometric degrees of motion exhibit markedly disparate levels of vocational resumption, subjective distress, and perceived disability.

The ICF framework reconciles these discrepancies by establishing three distinct levels of human functional functioning: Body Functions and Structures (anatomical integrity and physiological parameters), Activities (execution of tasks by an individual), and Participation (involvement in life situations and societal roles), all mediated by environmental and personal context. The MHQ was explicitly designed by Chung and colleagues to span the full breadth of this continuum:

The Body Functions level is reflected in the MHQ’s sensation, pain, and motion items. The Activity level is indexed via the 17 items dedicated to fine motor coordination, grasp, pinch, and bilateral coordination during daily activities. The Participation level is operationalized by the work performance subscale, which documents the social and economic impact of the impairment. Furthermore, the inclusion of aesthetics and satisfaction aligns with contemporary psychological models of body image, cognitive appraisal, and self-efficacy (Bandura, 1997). When a patient sustains an injury resulting in scarring or physical deformity, cognitive appraisal processes dictate the emotional response; perceived social visibility and internalized stigma can cause severe affective distress irrespective of functional capacity. By acknowledging aesthetics as an essential functional determinant, the MHQ-Sp embodies a comprehensive patient-centered measurement model.

7. Validity

Psychometric evaluation of the Spanish Michigan Hand Outcomes Questionnaire (MHQ-Sp) by Martínez-Fernández et al. (2024) included rigorous testing of construct, convergent, and discriminant validity in accordance with the COSMIN Risk of Bias checklist standards.

Convergent Validity

Convergent construct validity was demonstrated through bivariate correlation analysis with established upper extremity outcome metrics. The researchers hypothesized that the MHQ-Sp would exhibit strong, inverse correlations with the Spanish version of the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire, because higher MHQ scores denote superior functionality whereas higher DASH scores indicate greater disability. Consistent with this a priori theoretical hypothesis, the overall MHQ-Sp score demonstrated a robust negative correlation with the total DASH score:

r = -0.75 (p < 0.001)

Furthermore, examining the specific occupational subcomponents, the MHQ-Sp Work Performance domain demonstrated a statistically significant, strong negative correlation with the specialized DASH Work Module:

r = -0.63 (p < 0.001)

These robust coefficients confirm that the MHQ-Sp captures the core constructs of upper-extremity physical dysfunction and work-related impairment, mirroring established assessment standards while adding hand-specific resolution.

Discriminant Validity

Discriminant (divergent) validity is essential to verify that a health measurement tool captures its specific theoretical construct rather than generic systemic health or unrelated physiological traits. The MHQ-Sp demonstrated notable discriminant validity when correlated against the generic EuroQol 5-Dimensions (EQ-5D) index and objective dynamometric measurements:

• Correlation with EQ-5D: The correlation between the MHQ-Sp overall score and the EQ-5D utility score was negligible: r = -0.01 (p > 0.05). This illustrates that localized hand and wrist functioning represents a distinct construct that is not captured by broad, systemic health-related quality of life metrics evaluating generalized mobility, systemic self-care, or general anxiety.
• Correlation with Objective Grip Strength: When compared against physical dynamometry assessed via a standard Jamar hydraulic dynamometer, the correlation was statistically non-significant: r = 0.05 (p > 0.05). This dissociation illustrates that objective physiological capacity (raw force production) does not directly predict a patient’s subjective functional mastery, satisfaction, or aesthetic adjustment in daily life.

8. Reliability

The reliability profile of the MHQ-Sp was established through evaluations of internal consistency, temporal stability (test-retest reliability), and standard errors of measurement in a cohort of 262 patients recovering from acute traumas and neuromusculoskeletal disorders (e.g., distal radius fractures, tendon repairs, carpal tunnel syndrome).

Internal Consistency

Internal consistency was calculated using Cronbach’s alpha across all six subscales. The resulting coefficients ranged from 0.82 to 0.85 across the domains. In psychometric theory, values exceeding 0.70 reflect adequate reliability for group-level research, while values exceeding 0.80 indicate sufficient precision for individual-level clinical decision-making. Crucially, the values remained below the 0.90 threshold, confirming that the subscales do not suffer from excessive item redundancy or construct narrowing.

Test-Retest Reliability and Measurement Error

To evaluate temporal stability, a stable subsample of participants completed a second administration of the questionnaire across a 10 to 15-day interval—a time window chosen to minimize recall bias while ensuring no biological shift in tissue remodeling occurred. Intraclass Correlation Coefficients (ICC, two-way mixed-effects, absolute agreement model) ranged from 0.74 to 0.91 across all subscales, demonstrating moderate-to-excellent test-retest reproducibility.

To determine the margin of random error associated with any single administration, the researchers calculated the Standard Error of Measurement (SEM), yielding values between 1.70 and 4.67 points across the 0–100 scale. The corresponding Minimal Detectable Change at the 95% confidence level (MDC₉₅) confirmed that changes exceeding this baseline represent real functional alterations rather than measurement noise. Furthermore, the Minimal Clinically Important Difference (MCID) was determined to be > 6.85 points, providing clinicians with a clear threshold to verify therapeutic efficacy in post-surgical care and physical rehabilitation.

9. Factor Analysis

Structural validity of the MHQ-Sp was investigated utilizing both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) to assess whether the translated items preserved the latent structure of the original 1998 instrument.

Following cross-cultural translation procedures (forward-backward translation, expert committee review, and cognitive debriefing), CFA was conducted to evaluate the hypothesized unidimensionality of each of the six distinct subscales. Goodness-of-fit was evaluated against conventional structural equation modeling criteria: the Comparative Fit Index (CFI ≥ 0.95 indicating excellent fit), the Tucker-Lewis Index (TLI ≥ 0.95), and the Root Mean Square Error of Approximation (RMSEA ≤ 0.06 to 0.08).

The CFA confirmed robust structural validity across the six latent factors. All standardized factor loadings were statistically significant (p < 0.001), with the vast majority exceeding 0.70, indicating that each item accounts for substantial variance in its target construct without substantial cross-loading. Goodness-of-fit indices supported the hypothesized subscale configurations, confirming that the Spanish translation preserves the dimensional boundaries designed by the instrument’s original developers. Consequently, clinicians can calculate independent subscale scores for targeted diagnostic appraisal alongside an aggregate global composite score.

10. Instrument / Measurement Tool

• Test Type: Patient-Reported Outcome Measure (PROM); health-related quality of life and hand/wrist functional status questionnaire.
• Format: Paper-and-pencil self-report or electronic self-administered survey.
• Item Count: 37 items (evaluating bilateral functioning, fine motor activities, vocational strain, pain parameters, aesthetic appraisals, and functional satisfaction).
• Response Format: 5-point Likert-type scale across all functional, frequency, difficulty, and satisfaction prompts.
• Subscale Architecture:
  • Overall Hand Function (Items 1–10: right/left specific function, sensation, finger movement, wrist movement, and strength)
  • Activities of Daily Living (Items 11–20: bilateral tasks; Items 21–25: unilateral right/left specific tasks)
  • Work Performance (Items 26–30: vocational limitations, pacing, and adaptations)
  • Pain (Items 31–35: frequency, right/left severity, sleep interference, and daily disruption)
  • Aesthetics (Items 36–37: right/left hand cosmetic appearance)
  • Satisfaction with Hand Function (Items 38–39: right/left functional satisfaction)
• Scoring and Transformation Algorithm:
  • Raw categorical responses (1 through 5) are summed within each discrete domain.
  • Domain raw scores are normalized linearly to a standardized scale from 0 to 100 using standard conversion formulas: Score = [(Raw Domain Sum – Minimum Possible Score) / (Maximum Possible Score – Minimum Possible Score)] × 100.
  • Pain Scale Inversion: For the pain domain, raw scores are inverted: Pain Normalized Score = 100 – Calculated Raw Domain Score. Consequently, across all six subscales, a score of 100 denotes optimal health status (maximal function, no disability, zero pain, maximal cosmetic and functional satisfaction).
  • Overall Composite Score: Calculated by summing all six normalized domain scores and dividing by 6. Missing items are handled according to developers’ guidelines (if ≤ 20% of subscale items are missing, domain mean substitution is applied).
• Target Population: Adult patients (aged 18–65 years) undergoing conservative, surgical, or rehabilitative management for traumatic, orthopedic, or rheumatologic conditions affecting the hand or wrist.
• Administration Time: Approximately 10 to 15 minutes.

11. Permissions & Fee and Test Year

The original English version of the Michigan Hand Outcomes Questionnaire was developed and copyrighted in 1998 by Kevin C. Chung, MD, MS, and colleagues at the University of Michigan (Ann Arbor, Michigan, USA). The Spanish cross-cultural adaptation was published in 2024 following formal authorization and licensing by the original authors (MHQ IR code #3372).

The MHQ is accessible for academic research, non-commercial investigation, and routine individual clinical practice upon registration and adherence to standard licensing terms established by the University of Michigan’s Office of Technology Transfer and the instrument developers. Commercial applications, sponsored pharmaceutical or medical device clinical trials, and proprietary software integrations require a commercial user fee and formal licensing agreement. Academic institutions may request access through the official instrument repository or corresponding authors.

12. References

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Chung, K. C., Pillsbury, M. S., Walters, M. R., & Hayward, R. A. (1998). Reliability and validity testing of the Michigan Hand Outcomes Questionnaire. The Journal of Hand Surgery, 23(4), 575–587. https://doi.org/10.1016/S0363-5023(98)80042-7

Engel, G. L. (1977). The need for a new medical model: A challenge for biomedicine. Science, 196(4286), 129–136. https://doi.org/10.1126/science.847460

Hudak, P. L., Amadio, P. C., & Bombardier, C. (1996). Development of an upper extremity outcome measure: The DASH (disabilities of the arm, shoulder and hand). American Journal of Industrial Medicine, 29(6), 602–608. https://doi.org/10.1002/(SICI)1097-0274(199606)29:6<602::AID-AJIM4>3.0.CO;2-L

Martínez-Fernández, M. V., Sarabia-Cobo, C. M., & Sánchez-Labraca, N. (2024). Michigan Hand Outcomes Questionnaire – Spanish Version. Journal of Orthopaedic Surgery and Research, 19, Article 247. https://doi.org/10.1186/s13018-024-04723-x

Mokkink, L. B., Terwee, C. B., Patrick, D. L., Alonso, J., Stratford, P. W., Knol, D. L., Bouter, L. M., & de Vet, H. C. W. (2010). The COSMIN study reached international consensus on taxonomy, terminology, and definitions of measurement properties for health-related patient-reported outcomes. Journal of Clinical Epidemiology, 63(7), 737–745. https://doi.org/10.1016/j.jclinepi.2010.02.006

Shauver, M. J., & Chung, K. C. (2013). The Michigan Hand Outcomes Questionnaire after 15 years of field trial. Plastic and Reconstructive Surgery, 131(5), 779e–787e. https://doi.org/10.1097/PRS.0b013e3182865d83

World Health Organization. (2001). International Classification of Functioning, Disability and Health: ICF. World Health Organization. https://apps.who.int/iris/handle/10665/42407

13. Items of the Scale (Questionnaire)