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The test-retest reliability of the Military Physical Loading Questionnaire (MPLQ).

Russell J Coppack^1,2, J L Bilzon^2,3, A K Wills⁴

¹Academic Department of Military Rehabilitation, Defence Medical Rehabilitation Centre Stanford Hall, Loughborough, UK russ.coppack100@mod.gov.uk.

BMJ Military Health

|April 3, 2020

Summary

The Military Physical Loading Questionnaire (MPLQ) shows good reliability for assessing cumulative occupational demands in UK military personnel. This tool aids in understanding injury risk factors and informing health policies.

Keywords:

epidemiology occupational & industrial medicine preventive medicine rehabilitation medicine

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Area of Science:

Occupational Health
Military Medicine
Epidemiology

Background:

Musculoskeletal injuries are prevalent in UK military personnel.
There is limited data on occupational risk factors for these injuries.
A new questionnaire, the Military Physical Loading Questionnaire (MPLQ), was developed to assess physical loading during military service.

Purpose of the Study:

To examine the test-retest reliability of the Military Physical Loading Questionnaire (MPLQ).
To assess the reliability of occupational and operational physical loading items.
To determine if reliability is influenced by duration of service.

Main Methods:

Test-retest reliability was evaluated using intraclass correlation coefficients (ICC) over a 4-week interval.
The study included 50 male UK military personnel.
Internal consistency was assessed using Cronbach's alpha (α) coefficients, with stratified analysis by duration of service.

Main Results:

Reliability for individual operational items ranged from fair to almost perfect (ICC: 0.37-0.89).
Overall occupational item scores demonstrated substantial to almost perfect agreement (ICC: 0.73-0.94).
Reliability remained consistent across different durations of service.

Conclusions:

The MPLQ is a reliable self-report instrument for assessing cumulative occupational loading effects in UK military personnel.
This tool can support the planning of UK military health policies and services.
Further validation in diverse military populations is recommended for future epidemiological research.