Self-efficacy scale for weight loss among multi-ethnic women of lower income: a psychometric evaluation.

Objective: This study examined test-retest reliability, internal consistency, and construct and predictive validity of the Physical Activity and Nutrition Self-Efficacy (PANSE) scale, an 11-item instrument to assess weight-loss self-efficacy among postpartum women of lower income.

Methods: Seventy-one women completed the PANSE scale and psychosocial measures at baseline and at 7 and 13 weeks of a pilot study of weight loss.

Results: Test-retest reliability of PANSE scores was r = 0.55 (P < .01). Cronbach α was r = 0.89. Construct validity was supported by correlations with less-healthful behaviors (r = -0.33, P = .005), perceived stress (r = -0.24, P = .04), and decisional balance (r = 0.25, P = .03). PANSE change scores correlated with intervention group weight changes (r = -0.54, P < .01), although baseline scores did not. One factor emerged (loadings .80 to .57).

Conclusions And Implications: The PANSE scale demonstrated adequate reliability, internal consistency, construct validity, and moderate predictive validity. Replication is needed to confirm study findings.