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Table 6 Item-scale correlations of the Theory of Planned Behavior items and constructs

From: Development and psychometric properties of a belief-based Physical Activity Questionnaire for Diabetic Patients (PAQ-DP)

  Factors
Factors IA AA SN PBC SI Int
Instrumental attitude 1 0.42** 0.39** 0.13 0.13 0.20*
Beneficial - harmful 0.84** 0.31** 0.33** 0.11 0.08 0.17
Worthwhile - worthless 0.82** 0.30** 0.30** 0.06 0.20* 0.19*
Good - bad 0.86** 0.22** 0.33** 0.12 0.06 0.13
Relaxing - stressful 0.73** 0.52** 0.31** 0.15 0.07 0.16
Affective attitude 0.42** 1 0.33** 0.18* 0.19* 0.25**
Enjoyable - boring 0.53** 0.64** 0.25** 0.23* 0.20* 0.10
I feel sick 0.13 0.73** 0.11 0.04 0.08 0.07
Satisfied - unsatisfied 0.30** 0.79** 0.37** 0.14 0.14 0.38**
Subjective norm 0.39** 0.33** 1 0.04 0.01 0.33**
Think 0.36** 0.23* 0.78** 0.07 -0.01 0.32**
Want 0.32** 0.28** 0.83** 0.05 0.11 0.33**
Expect 0.37** 0.24** 0.79** -0.01 0.05 0.35**
I am under pressure 0.22* 0.27** 0.75** 0.02 -0.08 0.11
Perceived behavioral control 0.13 0.18* 0.04 1 0.28** 0.26**
Difficulty of doing physical activity 0.13 0.13 0.03 0.88** 0.23* 0.23**
Capability of doing physical activity 0.11 0.18* 0.04 0.89** 0.27** 0.23**
Self-identity 0.13 0.19* 0.01 0.28** 1 0.23*
Sporty 0.13 0.19* 0.01 0.21* 0.76** 0.26**
Healthy 0.07 0.11 0.12 0.31** 0.74** 0.16
Physically active person 0.10 0.09 0.04 0.15 0.75** 0.20*
Couch potato 0.07 0.15 -0.13 0.16 0.67** 0.04
Intention 0.20* 0.25** 0.33** 0.26** 0.23* 1
How likely 0.11 0.18* 0.25** 0.24** 0.19* 0.85**
I expect to do 0.23** 0.24** 0.31** 0.21* 0.20* 0.83**
  1. *p < .05, **p < .01
  2. IA: Instrumental attitude, AA: affective attitude, SN: Subjective norm, PBC: Perceived behavioral control, SI: Self-identity, Int: Intention,