Table. Deaths and Subsequent Bariatric Surgical Procedures Within 7 Years Following Initial Bariatric Surgery.
| Characteristic | No. of Participants | Rate (95% CI),a per 1000 Person-years |
Rate (95% CI),a per 700 Person-years |
|---|---|---|---|
| Roux-en-Y gastric bypass (n = 1738) | |||
| Deaths | 59 | 5.32 (1.72-12.39) | 3.72 (1.20-8.67) |
| Within 30 d of surgery | 3 | NA | NA |
| After 30 d of surgery | 56 | NA | NA |
| Subsequent bariatric surgery | 14 | 1.31 (0.03-7.31) | 0.92 (0.02-5.12) |
| Revision | 11 | NA | NA |
| Reversal | 3 | NA | NA |
| New procedure | 0 | NA | NA |
| Laparoscopic adjustable gastric band (n = 610) | |||
| Deaths | 15 | 3.92 (1.07-10.05) | 2.74 (0.75-7.04) |
| Within 30 d of surgery | 0 | NA | NA |
| After 30 d of surgery | 15 | NA | NA |
| Subsequent bariatric surgery | 160b | 43.27 (31.55-57.98) | 30.29 (20.45-43.32) |
| Port revision | 29c | NA | NA |
| Band replacement | 17 | NA | NA |
| Revision other than port or band replacement | 16 | NA | NA |
| Reversal | 63 | NA | NA |
| New procedure | 73d | NA | NA |
Abbreviation: NA, not applicable.
The rates were estimated by dividing the number of participants with the specified event by the person-years of observation. Rates are reported per 1000 person-years, a standard unit, and per 700 person-years, which is equivalent to the percentage of participants expected to have the event when followed up for 7 years. Exact CIs for rates were constructed using the Poisson distribution.
One hundred sixty participants underwent 204 surgeries in which 1 or more procedures were performed. Participants who underwent a reversal and a new procedure on different days are counted as having had 2 surgeries, a reversal and a new procedure. Participants who underwent a reversal and a new procedure on the same day are counted as having had 1 surgery, a new procedure only.
Thirty-two port revisions occurred among 29 participants.
Seventy-five new procedures occurred among 73 participants.