Chapter 7 130 Table 6 Hierarchical stepwise regression of exercise intention on selected theory of planned behavior, psychological, and disease variables (n = 196) Step/predictors R2 F df b 1 b2 b3 1. PBC 0.311 87.39 194 0.845*** 0.720*** 0.662*** 2. Attitude 0.334 48.45 193 0.095* 0.086* 3. Alliance 0.379 38.99 192 -0.080*** Note: ***p = 0.000, **p = 0.001, *p = 0.01; df = degrees of freedom; b1-b3 = standardized regression coefficients for model 1 to model 3. PBC: Perceived Behavioral Control Figure 1 shows a summary of the standardized betas of the regression analysis of the extended TPB model. Figure 1 Summary of the standardized betas from the regression analyses of the extended TPB model *p < 0.05; **p = 0.001; ***p = 0.000 PBC = Perceived Behavioral Control, MRC-score = Medical Research Council Dyspnea Scale score
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