Table 3.
Life table
| Years Since Surgery | No OI at Beginning of Year | First Reported Symptoms in Year | Loss of Follow‐up in Year | At Risk of Post‐Surgery OI During Yeara | Proportion of Patients Beginning to Experience Symptoms during Year | Proportion Without OI During Year | Cumulative Proportion With no OI | Cumulative Proportion with OI |
|---|---|---|---|---|---|---|---|---|
| 1 | 4547 | 45 | 1910 | 3592 | 0.0125 | 0.987 | 0.987 | 0.013 |
| 2 | 2592 | 20 | 1182 | 2001 | 0.0100 | 0.990 | 0.978 | 0.022 |
| 3 | 1390 | 10 | 409 | 1186 | 0.0084 | 0.992 | 0.969 | 0.031 |
| 4 | 971 | 7 | 182 | 880 | 0.0080 | 0.992 | 0.962 | 0.038 |
| 5 | 782 | 3 | 782 | 0.0038 | 0.996 | 0.958 | 0.042 |
Note. Data abstracted from Vanderbilt Synthetic Derivative and Vanderbilt Metabolic and Bariatric Surgery Quality, Efficacy, and Safety Database.
Abbreviation: OI, orthostatic intolerance.
Number of patients at risk for each time interval is calculated by subtracting half of the patients lost to follow‐up during a given interval from the number of patients without OI at the beginning of that interval.