Illness cognition as a predictor of exercise habits and participation in cardiac prevention and rehabilitation programs after acute coronary syndrome

Table 3 Associations of socio-demographic characteristics, medical variables, and cognitive variables with participation in CPRP six months after index hospitalization assessed by backward stepwise logistic regression ⁱ

variable	Block-1	Block-2	Block-3
	Odds ratioⁱⁱ(95% CI), P value	Odds ratioⁱⁱ(95% CI), P value	Odds ratioⁱⁱ (95% CI), P value
Ethnicity	0.11(0.06-0.19),p < 0.001	0.12(0.06-0.23),p < 0.001	0.14 (0.07-0.27), p < 0.001
Age	0.97 (0.95-0.99), p = 0.009	0.98(0.96-1.01),p = 0.143	0.99 (0.97-1.02),p = 0.475
SEP		1.14(1.01-1.29),p = 0.035	1.11 (0.98-1.26), p = 0.099
Marital status		0.59(0.32-1.10),p = 0.097	0.60 (0.31-1.14), p = 0.119
Education		1.22(0.99-1.49),p = 0.062	1.21 (0.98-1.49), p = 0.073
HMO membership		0.63 (0.37-1.09), p = 0.096	0.58 (0.33-1.01), p = 0.054
Diagnosis		0.33 (0.22-0.65),p < 0.001	0.38 (0.22-0.65), p < 0.001
History of IHD		0.55 (0.33-0.90), p = 0.018	0.52 (0.31-0.87), p = 0.013
Perceived benefits of exercise			1.56 (1.12-2.16), p = 0.009
Personal control			1.08 (1.01-1.15), p = 0.017
	Nagelkerke R² =0.21	Nagelkerke R² = 0.32	Nagelkerke R² = 0.36

ⁱP to exit > 0.20, within each block, so that variables in block 1 (ie. age) were retained in the final model even if their P values with the introduction of subsequent blocks increased to >0.2.
ⁱⁱValues: Exercise habits after six months: 0 = no; 1 = yes (dependent variable); Variables included in block-1: Ethnic group: 0 = Jews, 1 = Arabs; Gender: 0 = male, 1 = female; Age introduced as continuous variable (years) Variables included in block-2: SEP introduced as an ordinal variable (10 point scale from 1 = the least well off to 10 = the best off); Birth place: 0 = Israel, 1 = other; Marital status: 0 = married, 1 = other; Education level introduced as an ordinal variable (5 point scale from 1 = no formal education to 5 = Academic Education); Religiosity introduced as an ordinal variable (3 point scale from 1 = Secular to 3 = Religious); Employment status: 1 = yes; 2 = no; economic situation introduced as ordinal variable (6-point scale from 1 = excellent to 6 = very bad); HMO membership: 1 = Clalit, 2 = other; Diagnosis:0 = Myocardial infarction, 1 = Unstable Angina; History of IHD: 0 = no, 1 = yes; hospitalization unit: 1 = cardiac care unit, 2 = internal medicine; Variable included in block-3: Perceived susceptibility to CHD, Perceived severity of CHD, Perceived benefits of exercise, Perceived cost of exercise, Personal control, Treatment control introduced as an ordinal variable (5 point scale from 1 = not at all to 5 = very much.

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