---------------------------------------------------------------------------------- name: log: C:\Users\IRILab001\Downloads\Stata-Regressao.log log type: text opened on: 24 Oct 2017, 21:36:55 . sysuse bpwide.dta (fictional blood-pressure data) . sysuse bpwide.dta (fictional blood-pressure data) . sysuse bpwide.dta (fictional blood-pressure data) . sysuse bpwide.dta (fictional blood-pressure data) . sum Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- patient | 120 60.5 34.78505 1 120 sex | 120 .5 .5020964 0 1 agegrp | 120 2 .8199201 1 3 bp_before | 120 156.45 11.38985 138 185 bp_after | 120 151.3583 14.17762 125 185 . twoway (scatter bp_after bp_before) . reg bp_after bp_before Source | SS df MS Number of obs = 120 -------------+---------------------------------- F(1, 118) = 3.07 Model | 605.609872 1 605.609872 Prob > F = 0.0826 Residual | 23313.9818 118 197.576117 R-squared = 0.0253 -------------+---------------------------------- Adj R-squared = 0.0171 Total | 23919.5917 119 201.004972 Root MSE = 14.056 ------------------------------------------------------------------------------ bp_after | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- bp_before | .1980638 .1131295 1.75 0.083 -.0259634 .4220911 _cons | 120.3712 17.74556 6.78 0.000 85.2302 155.5123 ------------------------------------------------------------------------------ . twoway (scatter bp_after bp_before) . display 1.75^2 3.0625 . display 0.1980638/0.1131295 1.7507706 . display 1.7507706^2 3.0651977 . graph twoway (lfit bp_after bp_before) (scatter bp_after bp_before) . reg bp_after bp_before sex Source | SS df MS Number of obs = 120 -------------+---------------------------------- F(2, 117) = 6.11 Model | 2263.43905 2 1131.71952 Prob > F = 0.0030 Residual | 21656.1526 117 185.095322 R-squared = 0.0946 -------------+---------------------------------- Adj R-squared = 0.0792 Total | 23919.5917 119 201.004972 Root MSE = 13.605 ------------------------------------------------------------------------------ bp_after | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- bp_before | .114053 .113039 1.01 0.315 -.1098149 .3379209 sex | -7.674168 2.564243 -2.99 0.003 -12.75252 -2.59582 _cons | 137.3518 18.08883 7.59 0.000 101.5279 173.1758 ------------------------------------------------------------------------------ . tab sex, sum(bp_after) | Summary of After Sex | Mean Std. Dev. Freq. ------------+------------------------------------ Male | 155.51667 15.243217 60 Female | 147.2 11.742722 60 ------------+------------------------------------ Total | 151.35833 14.177622 120 . reg bp_after bp_before sex agegrp Source | SS df MS Number of obs = 120 -------------+---------------------------------- F(3, 116) = 14.62 Model | 6563.70379 3 2187.90126 Prob > F = 0.0000 Residual | 17355.8879 116 149.619723 R-squared = 0.2744 -------------+---------------------------------- Adj R-squared = 0.2556 Total | 23919.5917 119 201.004972 Root MSE = 12.232 ------------------------------------------------------------------------------ bp_after | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- bp_before | -.1273026 .1111557 -1.15 0.254 -.3474606 .0928554 sex | -9.033805 2.319358 -3.89 0.000 -13.62759 -4.440024 agegrp | 8.018799 1.49574 5.36 0.000 5.056297 10.9813 _cons | 159.7541 16.7915 9.51 0.000 126.4965 193.0118 ------------------------------------------------------------------------------ . twoway (scatter bp_after bp_before) (scatter bp_after agegrp) . twoway (scatter bp_after agegrp) . twoway (scatter bp_after sex ) . egen idsex=group(sex) . twoway (scatter bp_after idsex) . twoway (scatter bp_after sex ) . twoway (scatter bp_after sex ) . twoway (scatter bp_after idsex) . tab idsex, sum(bp_after) | Summary of After group(sex) | Mean Std. Dev. Freq. ------------+------------------------------------ 1 | 155.51667 15.243217 60 2 | 147.2 11.742722 60 ------------+------------------------------------ Total | 151.35833 14.177622 120 . twoway (scatter bp_after agegrp) . log close name: log: C:\Users\IRILab001\Downloads\Stata-Regressao.log log type: text closed on: 24 Oct 2017, 22:10:27 ---------------------------------------------------------------------------------