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Table 3 Assignment methods of independent variables

From: Fear of recurrence in elderly patients with coronary heart disease: the current situation and influencing factors according to a questionnaire analysis

Independent variable

Assignment method

Disease duration (years)

 < 1 = 1; 1 ~ 4 = 2; 5 ~ 9 = 3; > 10 = 4

Number of disease recurrences (times)

0 = 1; 1 = 2; 2 = 3; ≥ 3 = 4

Positive Coping(scores)

Substitute the original value

Social support(scores)

Substitute the original value