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. Author manuscript; available in PMC: 2018 Oct 1.
Published in final edited form as: Dig Dis Sci. 2017 Sep 7;62(10):2834–2839. doi: 10.1007/s10620-017-4731-7

Table 2.

Patient demographics, clinical data, and event frequency by BMI category

BMI category <30 (n = 210) 30–34.99 (n = 127) ≥35 (n = 81) p value*
Mean age in years (SD) 61.4 (8.6) 61.4 (6.8) 61.6 (7.6) 0.98
(95% CI) (44.5–78.3) (48.0–74.8) (46.7–76.5)
Male (%) 91.4 92.4 88.9 0.60
(95% CI) (87.2–94.6) (84.9–96.9) (80.0–94.8)
Mean ASA class (SD) 2.0 (0.2) 2.0 (0.1) 2.1 (0.4) 0.01
(95% CI) (1.6–2.4) (1.8–2.2) (1.4–2.8)
CHFa(%) 4.8 1.6 6.2 0.20
(95% CI) (2.3–8.6) (0.2–5.6) (2.0–13.8) 0.55
CADb(%) 13.8 17.3 12.3 0.54
(95% CI) (9.4–19.2) (11.1–25.0) (6.1–21.5)
COPD or asthmac(%) 12.4 8.7 12.3
(95% CI) (8.2–17.6) (4.4–15.0) (6.1–21.5)
Presence of OSA (%) 15.2 30.7 51.9 <0.01
(95% CI) (10.7–20.8) (22.8–39.5) (40.5–63.1) <0.01
Use of CPAP/BiPAP (%) 7.6 20.5 34.6
(95% CI) (4.4–12.1) (13.8–28.5) (24.3–46.0)
Mean Charlson Comorbidity Index (SD) 2.7 (1.6) 2.5 (1.5) 2.6 (1.4) 0.45
(95% CI) (0.0–5.8) (0.0–5.4) (0.0–5.5)
Use of MAC for sedation (%) 7.1 5.5 17.3 <0.01
(95% CI) (4.1–11.5) (2.2–11.0) (9.8–27.3)
Mean procedure time, minutes (SD)d 34.4 (17.2) 33.5 (16.5) 37.0 (23.2) 0.40
(Range) (5.0–85.0) (6.0–94.0) (13.0–122.0)
CAEs by BMI category
Overall frequency of CAEs (%) 43.8 48.0 50.6 0.53
(95% CI) (37.0–50.8) (39.1–57.1) (39.3–61.9)
  Systolic BP < 90 3.7 4.7 1.2
  Systolic BP >200 0.0 0.0 1.2
  Heart rate <55 8.6 11.0 8.6
  Heart rate >120 0.0 0.0 0.0
  Hypoxia <90% 34.8 40.9 43.2
  (95% CI) (28.3–41.6) (32.3–50.0) (32.2–54.7) 0.32
Overall frequency of interventione
  At least one intervention 36.1 40.9 44.4 0.39
  (95% CI) (29.7–43.1) (32.3–50.0) (33.4–55.9)
  At least 2 interventions 2.4 3.9 3.7
  At least 3 interventions 0.4 1.6 1.2
Intervention type
  Increase IV fluids 2.9 2.4 1.2
  >2L NC oxygen 34.3 40.2 43.2
  (95% CI) (27.9–41.1) (31.6–49.2) (32.2–54.7)
  Facemask 0.4 0.0 0.0
  Nasopharyngeal airway 1.0 3.1 3.7
  (95% CI) (0.1–3.4) (0.9–7.9) (3.7–10.4)
a

CHF = congestive heart failure

b

CAD = coronary artery disease

c

COPD or Asthma = COPD or asthma

d

Total procedure time = time from scope insertion to removal of scope from patient at end of procedure

e

Number of interventions required in one procedure

*

p value from unadjusted ANOVA testing