Table 2.
Post-bariatric surgery deaths
| Observed number | Observed rate /1,000PY | Expected number | Expected rate /1,000PY | SMR (95% Cl) | P value |
|
|---|---|---|---|---|---|---|
| Total (n=2458, PY=15616.15) | 76 | 4.9 | 74.9 | 4.8 | 1.02 (0.80–1.27) | 0.93 |
| Sex | ||||||
| Men (n=527, PY=3331.88) | 25 | 7.5 | 26.3 | 7.9 | 0.95 (0.62–1.40) | 0.90 |
| Women (n=1931, PY=12284.27) | 51 | 4.2 | 48.6 | 4.0 | 1.05 (0.78–1.38) | 0.77 |
| Age at time of surgery | ||||||
| 18–34 (n=470, PY=3035.57) | 6 | 2.0 | 2.8 | 0.9 | 2.14 (0.79–4.66) | 0.13 |
| 35–44 (n=674, PY=4300.12) | 18 | 4.2 | 8.8 | 2.0 | 2.06 (1.22–3.25) | 0.01 |
| 45–54 (n=714, PY=4491.43) | 25 | 5.6 | 20.6 | 4.6 | 1.21 (0.79–1.79) | 0.38 |
| ≥55 (n=600, PY=3789.04) | 27 | 7.1 | 42.7 | 11.3 | 0.63 (0.42–0.92) | 0.01 |
| Surgical procedure | ||||||
| RYGB (n=1770, PY=11289.88) | 59 | 5.2 | 49.6 | 4.4 | 1.19 (0.91–1.54) | 0.21 |
| LAGB (n=610, PY=3817.54) | 15 | 3.9 | 22.3 | 5.8 | 0.67 (0.38–1.11) | 0.14 |
| Other (n=78, PY=508.73)a | 2 | 3.9 | 2.4 | 4.6 | 0.85 (0.10–3.07) | 0.86 |
| Time since surgery | ||||||
| ≤30 days (n=2458, PY=201.67) | 4 | 19.8 | 0.7 | 3.7 | 5.37 (1.46–13.76) | 0.01 |
| >30 days and <1 year (n=2454, PY=2244.12) | 6 | 2.7 | 8.6 | 3.8 | 0.70 (0.26–1.52) | 0.49 |
| ≥1 year and <3 years (n=2432, PY=4831.23) | 12 | 2.5 | 20.7 | 4.3 | 0.58 (0.30–1.01) | 0.06 |
| ≥3 years and <5 years (n=2399, PY=4749.54) | 21 | 4.4 | 23.5 | 4.9 | 0.89 (0.55–1.37) | 0.70 |
| ≥5 years and <7 years (n=2353, PY=3589.60) | 33 | 9.2 | 21.4 | 5.9 | 1.55 (1.06–2.17) | 0.02 |
| Among RYGB (n=1770, PY=11289.88) | ||||||
| Sex | ||||||
| Men (n=357, PY=2268.48) | 17 | 7.5 | 16.3 | 7.2 | 1.04 (0.62–1.71) | 0.93 |
| Women (n=1413, PY=9021.41) | 42 | 4.7 | 32.3 | 3.7 | 1.26 (0.93–1.74) | 0.11 |
| Age at time of surgery | ||||||
| 18–34 (n=337,PY=2196.71) | 4 | 1.8 | 2.0 | 0.9 | 1.98 (0.54–5.07) | 0.28 |
| 35–44 (n=515, PY=3299.54) | 16 | 4.8 | 6.8 | 2.0 | 2.37 (1.35–3.85) | 0.004 |
| 45–54 (n=515, PY=3240.03) | 19 | 5.9 | 14.8 | 4.6 | 1.28 (0.77–2.00) | 0.33 |
| ≥55 (n=403, PY=2553.59) | 20 | 7.8 | 25.8 | 10.1 | 0.78 (0.47–1.20) | 0.29 |
| Time since surgery | ||||||
| ≤30 days (n=1770, PY=145.22) | 3 | 20.7 | 0.5 | 3.4 | 6.06 (1.25–17.71) | 0.03 |
| >30 days and <1 year (n=1767, PY=1614.32) | 6 | 3.7 | 5.7 | 3.5 | 1.05 (0.39–2.29) | 0.99 |
| ≥1 year and <3 years (n=1747, PY=3478.85) | 7 | 2.0 | 13.7 | 3.9 | 0.51 (0.21–1.06) | 0.07 |
| ≥3 years and <5 years (n=1730, PY=3427.14) | 15 | 4.4 | 15.5 | 4.5 | 0.97 (0.54–1.59) | 0.97 |
| ≥5 years and <7 years (n=1700, PY=2624.36) | 28 | 10.7 | 14.2 | 5.5 | 1.94 (1.29–2.81) | 0.002 |
| Among LAGB (n=610, PY=3817.54) | ||||||
| Sex | ||||||
| Men (n=145, PY=903.17) | 7 | 7.8 | 8.8 | 9.8 | 0.79 (0.32–1.63) | 0.70 |
| Women (n=465, PY=2914.37) | 8 | 2.7 | 13.4 | 4.6 | 0.60 (0.26–1.17) | 0.17 |
| Age at time of surgery | ||||||
| 18–34 (n=115, PY=720.81) | 2 | 2.8 | 0.6 | 0.9 | 3.12 (0.38–11.26) | 0.24 |
| 35–44 (n=141, PY=887.96) | 0 | 0.0 | 1.7 | 1.9 | 0.00 (0.00–2.16) | 0.36 |
| 45–54 (n=174, PY=1086.50) | 6 | 5.5 | 4.9 | 4.5 | 1.22 (0.45–2.66) | 0.73 |
| ≥55(n=180, PY=1122.27) | 7 | 6.2 | 15.0 | 13.4 | 0.47 (0.19–0.96) | 0.04 |
| Time since surgery | ||||||
| ≤30 days (n=610, PY=50.10) | 0 | 0.0 | 0.2 | 4.5 | 0.00 (0.00–18.34) | 0.36 |
| >30 days and <1 year (n=610, PY=559.13) | 0 | 0.0 | 2.6 | 4.7 | 0.00 (0.00–1.41) | 0.14 |
| ≥1 year and <3 years (n=608, PY=1198.38) | 5 | 4.2 | 6.3 | 5.3 | 0.79 (0.26–1.84) | 0.80 |
| ≥3 years and <5 years (n=592, PY=1168.61) | 5 | 4.3 | 7.2 | 6.1 | 0.70 (0.23–1.62) | 0.55 |
| ≥5 years and ≤7 years (n=577, PY=841.33) | 5 | 5.9 | 5.9 | 7.0 | 0.85 (0.28–1.98) | 0.92 |
CI=confidence interval; LAGB=laparoscopic adjustable gastric band; PY=person years; RYGB=Roux-en-Y gastric bypass; SMR=standardized mortality ratio
a
59 sleeve gastrectomy and 19 biliopancreatic diversion – duodenal switch