Table 1.
Patient demographics and clinical characteristics by age and BMI in patients undergoing broad range of surgical procedures
| Characteristic | Age < 65 years | Age ≥ 65 years | p value | BMI < 30 kg/m2 | BMI ≥ 30 kg/m2 | p value | Age ≥ 65 years with BMI ≥ 30 kg/m2 |
|---|---|---|---|---|---|---|---|
| N | 483 | 241 | 389 | 335 | 120 | ||
| Female, n (%) | 334 (69.2) | 136 (56.4) | 253 (65.0) | 217 (64.8) | 72 (60.0) | ||
| Age (years), mean ± SD | 46.2 ± 2.5 | 71.4 ± 5.1 | 53.1 ± 17.4 | 56.2 ± 13.8 | 0.008 | 70.3 ± 4.5 | |
| < 65, n (%) | – | – | 268 (68.9) | 215 (64.2) | 0.180 | – | |
| ≥ 65, n (%) | – | – | 121 (31.1) | 120 (35.8) | – | ||
| Raceb, n (%) | |||||||
| White | 370 (76.6) | 205 (85.8) | 305 (78.8) | 270 (80.6) | 101 (84.2) | ||
| African American | 90 (18.6) | 26 (10.9) | 64 (16.5) | 52 (15.5) | 15 (12.5) | ||
| Other | 23 (4.8) | 8 (3.4) | 18 (4.7) | 13 (3.9) | 4 (3.3) | ||
| BMI (kg/m2), mean ± SD | 30.5 ± 7.8 | 30.6 ± 6.4 | 0.875 | 25.3 ± 3.3 | 36.7 ± 5.8 | 35.6 ± 4.8 | |
| < 30, n (%) | 268 (55.5) | 121 (50.2) | 0.180 | – | – | – | |
| ≥ 30, n (%) | 215 (44.5) | 120 (49.8) | – | – | – | ||
| Baseline NRS pain scorea, mean ± SD | 6.3 ± 2.2 | 6.0 ± 2.1 | 6.2 ± 2.0 | 6.3 ± 2.2 | 6.0 ± 2.1 |
p values represent comparison of the characteristics listed in column 1 between elderly vs. nonelderly; and between obese and non-obese
aPatients’ self-rated pain on an 11-point NRS: 0 = no pain to 10 = worst pain imaginable
bMissing information in 2 patients