Table 3 Results of binary logistic regression analysis for likelihood of improvement from greater occipital nerve injection. Variables in italics were associated with negative beta values and therefore a decreased likelihood of the outcome
Predictor Variable | p value | Odds ratio | 95% Confidence Interval |
|---|---|---|---|
Age (measured in years) | 0.38 | 1.2 | 0.8–1.8 |
Gender (female) | 0.74 | 1.2 | 0.4–3.6 |
Chronic migraine diagnosis | 0.32 | 4.0 | 0.3–62.2 |
TAC diagnosis | 0.45 | 3.0 | 0.2–50.6 |
Medication overuse | 0.89 | 1.1 | 0.4–3.1 |
Headache frequency (days) | 0.47 | 1.0 | 0.9–1.1 |
Years of headache | 0.58 | 1.0 | 0.8–1.1 |
Number of past preventives | 0.46 | 1.2 | 0.8–1.6 |
Time from diagnosis to injection (weeks) | 0.18 | 1.0 | 0.9–1.0 |
Side effects | 0.53 | 1.8 | 0.3–11.0 |