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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: Dis Esophagus. 2011 Oct 3;25(6):477–483. doi: 10.1111/j.1442-2050.2011.01271.x

Table 4.

Linear regression output using total QOLRAD score as dependent variable.

Variable* Unstandardized
Coefficients		 p 95% Confidence Interval for
Slope
Slope Std. Error Lower Bound Upper Bound
Constant 6.816 .819 .000 5.173 8.459
Heartburn Troublesome Score −.012 .005 .031 −.022 −.001
Regurgitation Troublesome Score −.014 .006 .019 −.026 −.002
Age −.032 .014 .026 −.060 −.004
% Time pH < 4.0** .092 .045 .047 .001 .183
*

Output from second model after elimination of total reflux episodes for Day 1 and Day 2 (p > 0.1 in first regression model).

**

For both days of pH study.