Table 2.
Systolic Blood Pressure * | Diastolic Blood Pressure * | ||||
---|---|---|---|---|---|
Effect | β-Estimate (SE) | P value | β-Estimate (SE) | P value | |
Model 1† | Treatment×Month | −0.040 (0.071) | 0.57 | 0.023 (0.041) | 0.57 |
Model 2‡ | Treatment×Month | −0.036 (0.071) | 0.61 | 0.029 (0.041) | 0.48 |
Calcium | 0.869 (0.856) | 0.31 | 0.787 (0.539) | 0.15 | |
Model 3§ | Treatment×Month | −0.018 (0.071) | 0.80 | 0.030 (0.041) | 0.46 |
Calcium | 2.494 (1.278) | 0.051 | 0.936 (0.797) | 0.24 | |
Treatment×Calcium | −2.943 (1.719) | 0.09 | −0.274 (1.082) | 0.80 | |
Model 4‖ | Treatment×Month | −0.023 (0.070) | 0.75 | 0.024 (0.041) | 0.56 |
Calcium | 2.740 (1.258) | 0.030 | 1.051 (0.791) | 0.18 | |
Treatment×Calcium | −2.779 (1.695) | 0.10 | −0.221 (1.073) | 0.84 |
Regression coefficient (β-Estimate), corresponding standard error (SE), and P value for effect indicated.
Model 1 included treatment (Treatment), number of months on treatment (Month), and the interaction term of Treatment×Month measured at each sampling.
Model 2 included the variables in model 1 and mean-centered calcium.
Model 3 included the variables in model 2 and the interaction term of Treatment×Calcium. Consult results of Tables 3–4 for rationale for testing Treatment×Calcium.
Model 4 included the variables in model 3 and age at entry to the study, race, and BMI measured at the time of each blood sampling.