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Table 1 Description and operationalization of social-cognitive variables

From: Socio-demographic, medical and social-cognitive correlates of physical activity behavior among older adults (45–70 years): a cross-sectional study

Concepts # Items Example of item question (answer option) α Reference
Advantages (attitude) 13 Being physically active on at least 5 days a week for 30 minutes, improves my condition (1 = completely disagree; 5 = completely agree) 0.86 [16]
Disadvantages (attitude) 11 Being physically active on at least 5 days a week for 30 minutes, is very time consuming (1 = completely disagree; 5 = completely agree) 0.81 [16]
Social support (perceived norm) 5 Do important others (partner, family, friends, doctor or media) encourage you to be physically active according to the guidelines (1 = completely disagree, 5 = completely agree) 0.81 [16]
Descriptive norm (perceived norm) 3 Do important others (partner, family, friends) meet the physically activity norm (physically active for 30 minutes on at least 5 days a week) (1 = completely disagree, 5 = completely agree) 0.76 [16]
Perceived behavioral control 11 To what extent would you be able to be physically active on at least 5 days a week for 30 minutes, when you are tired? (1 = completely unable; 5 = completely able) 0.92 [17]
Action plan (actual control) 6 If you want to improve your PA level what would you do? “go for a brisk walk daily” (0 = no, 1 = yes) - [18]
Stages of change/intention 1 Which statement fits you best? Ranging from 1=”I have no plans to be physically active on at least 5 days for 30 minutes a day (no motivation) to 6=”I have been physically active on at least 5 days a week for 30 minutes for longer than 6 months” (maintainer). - [19]