Table 1. Patient characteristics.
| Study variable | Drainage system, n (%) | P value | |
|---|---|---|---|
| Atrium (Analog) | Thopaz (Digital) | ||
| Sample size | N=50 | N=53 | |
| Gender | 0.488 | ||
| Male | 27 (51.9) | 25 (48.1) | |
| Female | 23 (45.1) | 28 (54.9) | |
| Age, mean, SD | 64.8, 10.6 | 68.5, 10.3 | 0.077 |
| Previous cancer | 0.653 | ||
| Yes | 22 (51.2) | 21 (48.8) | |
| No | 28 (46.7) | 32 (53.3) | |
| Cardiac diseases (MI or arrhythmia) | 0.850 | ||
| Yes | 15 (50.0) | 15 (50.0) | |
| No | 35 (47.9) | 38 (52.1) | |
| COPD | 0.480 | ||
| Yes | 12 (42.9) | 16 (57.1) | |
| No | 38 (50.7) | 37 (49.3) | |
| Obstructive sleep apnea | 0.111 | ||
| Yes | 3 (100.0) | 0 | |
| No | 47 (47.0) | 53 (53.0) | |
| Hypercholesterol | 0.283 | ||
| Yes | 8 (38.1) | 13 (61.9) | |
| No | 42 (51.2) | 40 (48.8) | |
| Diabetes | 0.474 | ||
| Yes | 6 (40.0) | 9 (60.0) | |
| No | 44 (50.0) | 44 (50.0) | |
| VTE | 0.243 | ||
| Yes | 0 | 3 (100.0) | |
| No | 50 (50.0) | 50 (50.0) | |
| Current NSAID use | 1.00 | ||
| Yes | 2 (40.0) | 3 (60.0) | |
| No | 48 (49.0) | 50 (51.0) | |
| Smoking | 0.195 | ||
| Current | 14 (53.8) | 12 (46.2) | |
| Quit less than 1 year ago | 8 (66.7) | 4 (33.3) | |
| Quit more than 1 year ago | 14 (35.9) | 25 (64.1) | |
| Never | 14 (53.8) | 12 (46.2) | |
| Smoking pack years | 0.388 | ||
| 0 | 14 (53.8) | 12 (46.2) | |
| <10 | 1 (20.0) | 4 (80.0) | |
| 10–20 | 5 (33.3) | 10 (66.7) | |
| 20–40 | 15 (48.4) | 16 (51.6) | |
| >40 | 15 (57.7) | 11 (42.3) | |
| FEV1 (%) | 0.793 | ||
| >80 | 37 (49.3) | 38 (50.7) | |
| <80 | 13 (46.4) | 15 (53.6) | |
| DLCO (%) | 0.399 | ||
| >80 | 16 (55.2) | 13 (44.8) | |
| <80 | 34 (45.9) | 40 (54.1) | |
| BMI | 0.407 | ||
| <18.5 | 0 | 2 (100) | |
| 18.5–25 | 15 (50.0) | 15 (50.0) | |
| 25–30 | 21 (55.3) | 17 (44.7) | |
| >30 | 14 (42.4) | 19 (57.6) | |
| Surgeon identification | 0.853 | ||
| 1 | 20 (48.8) | 21 (51.2) | |
| 2 | 12 (44.4) | 15 (55.6) | |
| 3 | 18 (51.4) | 17 (48.6) | |
| Procedure | 0.664 | ||
| Lobectomy | 32 (49.2) | 33 (50.8) | |
| Bilobectomy | 4 (80.0) | 1 (20.0) | |
| Segmentectomy | 6 (42.9) | 8 (57.1) | |
| Single wedge | 4 (40.0) | 6 (60.0) | |
| Multiple wedge | 4 (44.4) | 5 (55.6) | |
| Procedure type | 0.363 | ||
| Open | 29 (52.7) | 26 (47.3) | |
| VATS | 21 (43.8) | 27 (56.2) | |
| Resection type | 0.394 | ||
| Lobe | 36 (51.4) | 34 (48.6) | |
| Sublobar | 14 (42.4) | 19 (57.6) | |
| Side of resection | 0.286 | ||
| Left | 26 (54.2) | 22 (45.8) | |
| Right | 24 (43.6) | 31 (56.4) | |
NSAID, non-steroidal anti-inflammatory drug; VATS, video-assisted thoracoscopic surgery.