Patient group according to duration of symptom relief
| Group | No. Patients (%) |
|---|---|
| No relief | 17 (21%) |
| <1 Month's relief | 19 (23.5%) |
| 1–2 Months' relief | 10 (12.3%) |
| 2–6 Months' relief | 5 (6.2%) |
| 6–12 Months' relief | 15 (18.5%) |
| >1 Year's relief | 15 (18.5%) |
| Total | 81 (100%) |