TABLE 3.

Stepwise Linear Regression Model of Change in Pain Level (Score 0–10) From Baseline to Last Follow-up

Independent VariablesBSignificanceR2
Intercept6.868.0001
Drops1.218.00010.073
Severity
 MildRejected#Rejected#
 Moderate§Rejected#Rejected#
 Severe1.0210.0010.055
Age (y)*Rejected#Rejected#
With antibioticsRejected#Rejected#
All related symptomsRejected#Rejected#
TemperatureRejected#Rejected#
All other symptoms−0.401.00010.07
  • R2 of variables in last step = 0.198; R2 of variables not in last step = 0.022; Total R2 = 0.22 Independent variables:

  • * age;

  • drops (dummy variable), NHED = 1, anesthetic = 0;

  • mild pain (dummy variable), mild = 1, moderate + severe = 0;

  • § moderate pain (dummy variable), moderate = 1, mild + severe = 0;

  • severe pain (dummy variable), severe = 1, mild + moderate = 0;

  • fever (dummy variable), ≥38.5°C = 1, 37.5–38.4°C = 0.

  • # Variables rejected from the model because of lack of significance (P < .05).