Table 6. ppo%DLCO, mean differences between the ppo and po values at 3 and 12 months after lobectomy and the limit of agreement.
| Method of estimation | ppo%DLCO (%) | Mean difference with po%DLCO (%), 3M | Limit of agreement −2SD, 2SD (%) | Determination coefficient | Mean difference with po%DLCO (%), 12M | Limit of agreement −2SD, 2SD (%) | Determination coefficient |
|---|---|---|---|---|---|---|---|
| RUL | |||||||
| S | 98.7±25.2 | −1.3±12.8 | −26.92, 24.23 | R2=0.68; P<0.01 | 7.5±12.9 | −18.26, 33.34 | R2=0.72; P<0.01 |
| Q | 96.8±23.2 | 0.6±10.9 | −21.30, 22.45 | R2=0.69; P<0.01 | 9.5±12.1 | −14.81, 33.73 | R2=0.74; P<0.01 |
| CT | 92.4±22.1 | 5.0±9.1 | −13.10, 23.16 | R2=0.77; P<0.01 | 13.9±11.2 | −8.43, 36.25 | R2=0.80; P<0.01 |
| CTLAV | 93.3±22.5 | 4.0±9.7 | −15.44, 23.52 | R2=0.77; P<0.01 | 12.9±11.2 | −9.39, 35.25 | R2=0.81; P<0.01 |
| RLL | |||||||
| S | 90.2±23.4 | 8.5±15.4 | −22.29, 39.34 | R2=0.43; P<0.01 | 14.1±18.0 | −21.83, 49.99 | R2=0.58; P<0.01 |
| Q | 90.3±23 | 8.4±16.3 | −24.33, 41.02 | R2=0.38; P<0.01 | 13.9±18.7 | −23.56, 51.37 | R2=0.58; P<0.01 |
| CT | 95.4±23.9 | 3.3±18.3 | −33.36, 39.92 | R2=0.29; P=0.02 | 8.8±20 | −31.21, 48.89 | R2=0.48; P<0.01 |
| CTLAV | 95.9±23.9 | 2.8±17.9 | −32.97, 38.62 | R2=0.28; P=0.02 | 8.4±19.8 | −31.30, 48.07 | R2=0.47; P<0.01 |
| LUL | |||||||
| S | 82.4±18.4 | 2.5±11.6 | −20.77, 25.71 | R2=0.66; P<0.01 | 12.1±12.8 | −13.40, 37.62 | R2=0.54; P<0.01 |
| Q | 81.3±18.6 | 3.6±11.3 | −19.11, 26.22 | R2=0.72; P<0.01 | 13.2±12.2 | −11.18, 37.58 | R2=0.60; P<0.01 |
| CT | 78.2±18.8 | 6.7±13.7 | −18.33, 32.82 | R2=0.51; P<0.01 | 16.3±14 | −9.55, 43.33 | R2=0.50 P<0.01 |
| CTLAV | 79.2±18.5 | 5.6±13.6 | −19.39, 31.72 | R2=0.51; P<0.01 | 15.3±13.9 | −10.56, 42.17 | R2=0.50; P<0.01 |
| LLL | |||||||
| S | 91.3±18.2 | −2.7±13.8 | −30.31, 25.00 | R2=0.61; P<0.01 | 2.5±10.6 | −18.67, 23.64 | R2=0.69; P<0.01 |
| Q | 90.3±18.3 | −1.7±15 | −31.63, 28.15 | R2=0.61; P<0.01 | 3.4±11.9 | −20.45, 27.26 | R2=0.69; P<0.01 |
| CT | 91.6±18.6 | −3.0±15.3 | −32.16, 24.92 | R2=0.61; P<0.01 | 2.2±10.7 | −21.62, 24.67 | R2=0.69; P<0.01 |
| CTLAV | 91.8±18.5 | −3.2±13.5 | −32.24, 24.47 | R2=0.61; P<0.01 | 1.9±10.6 | −21.70, 24.22 | R2=0.69; P<0.01 |
Values are represented as mean ± SD. RUL, right upper lobectomy; RLL, right lower lobectomy; LUL, left upper lobectomy; LLL, left lower lobectomy. COPD, chronic obstructive pulmonary disease; %DLCO, percent predicted lung diffusion capacity for carbon monoxide; LAV, low-attenuation volume; Limit of agreement, mean ± 2 SD; M, months; po, postoperative value; ppo, predicted postoperative value.