Table 4.
Variable | Comparison | Odds Ratio | (95% CI) | p-value |
---|---|---|---|---|
Treatment Arm | 2.5 Gy × 10 vs. | RL | ||
2.0 Gy × 18 vs. | 8.00 | (1.29, 49.50) | 0.03 | |
1.5 Gy × 24 | 4.37 | (0.81, 23.60) | 0.09 | |
Age | Continuous | 1.12 | (1.04, 1.21) | 0.005 |
Education Level | ≤ High School | 2.96 | (0.85, 10.29) | 0.09 |
> High School | RL |
A backward method was used. The following variables were initially entered into the model: Treatment arm (2.5 Gy × 10 (referent) vs. 2.0 Gy × 18 vs. 1.5 Gy × 18), age (continuous), gender (male (referent) vs. female), education level (≤ high school vs. > high school (referent)), and marital status (married/living as married (referent) vs. single/divorced/widowed). Parameters with a p < 0.1 remained in the model.
CI = Confidence Interval; vs. = versus; RL = Reference Level