Patient clinical and demographic characteristics of thoracentesis procedures and outcomes
| All procedures (N=9320) | Procedures with any complication (N=91) | p Value* | Procedures with pneumothorax (N=57) | p Value* | |
|---|---|---|---|---|---|
| Age (years), n (%) | 0.46 | 0.74 | |||
| <60 | 2194 (23.77) | 26 (28.57) | 13 (22.81) | ||
| 60–75 | 2906 (31.48) | 22 (24.18) | 17 (29.82) | ||
| >75 | 4220 (45.72) | 43 (47.25) | 27 (47.37) | ||
| Male, n (%) | 4656 (50.44) | 52 (57.14) | 0.19 | 35 (61.40) | 0.10 |
| BMI category, n (%) | 0.02 | 0.06 | |||
| Underweight <18.0 | 603 (6.53) | 9 (9.90) | 9 (15.79) | ||
| Normal weight 18.0–24.9 | 4611 (50.0) | 45 (49.45) | 24 (42.11) | ||
| Overweight 25–29.9 | 2508 (26.17) | 25 (27.47) | 17 (29.82) | ||
| Obese 30–39.9 | 1392 (15.08) | 12 (13.19) | 7 (12.28) | ||
| Morbidly obese >40 | 206 (2.23) | 0 | 0 | ||
| Charlson score, mean (SD) | 3.6 (2.9) | 4.0 (3.2) | 0.16 | 3.9 (2.9) | 0.41 |
| INR category, n (%) | 0.97 | 0.58 | |||
| 0.8–1.49 | 6589 (70.80) | 61 (67.03) | 39 (68.40) | ||
| 1.5–2.99 | 2005 (21.5) | 20 (22.00) | 13 (22.80) | ||
| >3.1 | 301 (3.2) | 5 (5.50) | 1 (1.80) | ||
| Partial thromboplastin time, mean (SD) | 41.3 (21.8) | 46.3 (27.8) | 0.03 | 47.0 (32.5) | 0.06 |
| Platelet category, n (%) | 0.55 | 0.21 | |||
| <20 | 53 (0.57) | 0 | 0 | ||
| 20–49 | 359 (3.90) | 4 (4.40) | 2 (3.51) | ||
| 50–100 | 1002 (10.9) | 13 (14.29) | 5 (8.77) | ||
| >100 | 7670 (82.10) | 74 (84.61) | 48 (84.21) | 7670 (82.10) | |
| Volume category, n (%), mL | <0.0001 | <0.0001 | |||
| 0 | 35 (0.38) | 1 (1.10) | 1 (1.75) | ||
| 1–1500 | 8486 (91.94) | 65 (71.43) | 38 (66.67) | ||
| >1500 | 799 (8.66) | 25 (27.47) | 18 (31.58) | ||
| Bilateral procedure, n (%) | 3796 (41.12) | 19 (20.89) | <0.0001 | 10 (17.54) | <0.0001 |
| Invasive or non-invasive mechanical ventilation, n (%) | 1377 (14.92) | 17 (18.68) | 0.49 | 11 (19.30) | 0.37 |
| Needle passes category, n (%) | 0.002 | 0.001 | |||
| 1 | 9190 (99.57) | 89 (97.80) | 55 (96.49) | ||
| ≥2 | 73 (0.78) | 2 (2.20) | 2 (3.51) | ||
| Supine, n (%) | 473 (5.12) | 6 (6.59) | 0.51 | 6 (10.53) | 0.08 |
All comparisons are at the univariate level.
*All listed categorical variables were made continuous in the univariate Poisson regression.
BMI, body mass index; INR, International Normalised Ratio.