The Kaplan and Meier and the Nelson estimate for the probability of ulcer recurrence 10 and 15 years after parietal cell vagotomy.
The use of a nonparametric estimate from incomplete observations is demonstrated on ulcer recurrence 10-15 years after parietal cell vagotomy in 339 patients with duodenal ulcer. The median period of observation was 108 months (range: 1-197 months). Proven recurrent ulcer developed in 62 patients. The life-table method as described by Kaplan and Meier and Nelson's modification are demonstrated. The calculated risk of recurrence after 10 years was 23% (+/- 3.8%) and after 15 years was 27% (+/- 4.3%). The rate of recurrence seemed to decline toward the end of the trial time.
Meisner
S
S
Surgical Department 1, Kommunehospitalet, Copenhagen, Denmark.
Jørgensen
L N
LN
Jensen
H E
HE
D004381:Duodenal Ulcer / Q000453:epidemiology* / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D011336:Probability; D012008:Recurrence; D012042:Registries; D012307:Risk Factors; D013276:Stomach Ulcer / Q000453:epidemiology* / Q000601:surgery; D013997:Time Factors; D014629:Vagotomy, Proximal Gastric