Development, Construct Validity, and Reliability Testing of a Revised Version of the Leisure Time Physical Activity Questionnaire for People With Spinal Cord Injury.

User interviews with adults with SCI provided information to refine the LTPAQ-SCI(R) and support its content validity.

• Ten adults with SCI (6 male, 4 female) were interviewed during the development phase.
• The revised questionnaire was designed to measure all four components of the SCI exercise guidelines: exercise frequency, intensity, duration, and type.
• Interview findings were used to refine questionnaire items and establish content validity.

LTPAQ-SCI(R) measures of aerobic and strength-training LTPA shared large correlations with other self-report measures of physical activity.

• Twenty-three adults with SCI (mean age 50 ± 14 years; 18 male, 5 female) completed the validity and reliability testing protocol.
• Minutes per week of aerobic and strength-training LTPA correlated with other self-report measures of aerobic LTPA, aerobic MVPA, and strength-training LTPA.
• Correlation coefficients ranged from r = 0.542 to 0.687, all Ps < .01.
• These correlations were characterized as 'large' in magnitude.

LTPAQ-SCI(R) measures of aerobic LTPA and total LTPA showed significant medium-sized positive correlations with cardiorespiratory fitness (relative V̇O2peak).

• Minutes per week of aerobic LTPA correlated with relative V̇O2peak at r = 0.393 (P < .05).
• Minutes per week of all LTPA (combined aerobic and strength-training) correlated with relative V̇O2peak at r = 0.406 (P < .05).
• These correlations were characterized as 'medium-sized' in magnitude.
• Cardiorespiratory fitness was assessed via peak oxygen consumption (V̇O2peak) testing.

All variables measured by the LTPAQ-SCI(R) demonstrated good-to-excellent test-retest reliability.

• Intraclass correlations (ICCs) ranged from 0.854 to 1.000 across all measured variables.
• All ICC values were statistically significant at P < .001.
• The range of ICC values (0.854 to 1.000) spans the 'good' to 'excellent' reliability categories.

The LTPAQ-SCI(R) is recommended for use in community- and rehabilitation-based settings to collect epidemiological data on LTPA participation among individuals with SCI.

• The questionnaire is designed to capture all four components of SCI exercise guidelines: frequency, intensity, duration, and type.
• The authors describe the evidence as 'preliminary' given the sample size of 23 participants for validity and reliability testing.
• Recommended applications include both community-based and rehabilitation-based settings.
• The primary recommended use is for collecting epidemiological data on LTPA participation in the SCI population.