Reference no: EM132232589

1) I need the interpretation of the coefficient b1 = 5.0 for the independent variable x = age (years), when it is obtained from a multiple regression model with y = body weight (kg) as the dependent variable.

2) I need the interpretation of the coefficient b1 = 5.0 for the independent variable gender, with x1 = 1 for males and x1 = 0 for females when it is obtained from a multiple regression model with y = body weight (kg) as the dependent variable.

3) A study was conducted to investigate whether a quality improvement project implemented during surgeries affects the risk of surgical site infection. A multiple logistic regression model was conducted for the analysis, where the dependent variable is the risk of surgical site infection while the independent variable x is interpretation, with x1=1 for post-implementation and x1=0 for pre-implementation. The result showed that, after controlling for other factors in the regression model, the risk of surgical site infections was significantly lower in the postimplementation period compared to those in the pre-implementation period (odds ratio [OR] 0.47 [95% CI 0.31-0.71]; P<.001).

1) I need the result of odds ratio.

2) I need to know what does P<.001 mean? (P -> p-value)