Background: There is no consensus whether patients who underwent endoscopic common bile duct (CBD) stone removal should be followed up periodically and whether patients with gallbladder (GB) stones should undergo cholecystectomy. Thus, this study aimed to investigate the recurrence rate of CBD stones and the difference in recurrence rate according to cholecystectomy.
Methods: We conducted a population-based study using the National Health Insurance database. Patients diagnosed with CBD stones and with procedure registry of endoscopic stone removal were included. The primary outcome was the recurrence rate of CBD stones. The secondary outcome was the difference in recurrence rate of CBD stones according to cholecystectomy.
Results: A total of 46,181 patients were identified. The mean follow-up was 4.2 years. The first CBD stone recurrence occurred in 5228 (11.3%) patients. The cumulative first recurrence rate was low. However, the second and third recurrence rates were 23.4 and 33.4%, respectively. The cumulative second and third recurrence rates were high and gradually increased with time. The recurrence rate in the non-cholecystectomy group was higher than that in the cholecystectomy group (p < 0.0001). The relative risk for CBD stone recurrence in the non-cholecystectomy group was higher in younger patients, with 3.198 in patients < 50 years, 2.371 in 50-59 years, 1.618 in 60-69 years, and 1.262 in ≥ 70 years (p < 0.0001).
Conclusions: Regular follow-up is not routinely recommended for patients with first-time endoscopic stone removal, but is recommended for patients with recurrent stones. Cholecystectomy is recommended for patients with GB stones who are younger than 70 years.
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