Table 3. 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 |
|---|---|---|---|---|---|---|---|
| Non-COPD | |||||||
| S | 97.0±23.7 | 0.9±15.2 | −28.80, 31.39 | R2=0.62; P<0.01 | 10.7±15.8 | −20.50, 43.10 | R2=0.60; P<0.01 |
| Q | 95.7±22.4 | 2.2±14.5 | −26.18, 31.27 | R2=0.62; P<0.01 | 12.0±15.4 | −18.39, 43.49 | R2=0.64; P<0.01 |
| CT | 95.8±23.3 | 2.0±14.2 | −26.57, 31.21 | R2=0.65; P<0.01 | 11.8±14.8 | −18.60, 43.25 | R2=0.66; P<0.01 |
| CTLAV | 96.4±23.5 | 1.4±14.4 | −27.67, 31.06 | R2=0.64; P<0.01 | 11.2±14.8 | −19.10, 42.5 | R2=0.67; P<0.01 |
| COPD | |||||||
| S | 86.4±21.5 | 1.8±12.8 | −23.77, 27.37 | R2=0.70; P<0.01 | 7.6±11.7 | −15.87, 31 | R2=0.76; P<0.01 |
| Q | 85.7±21.6 | 2.4±13.1 | −23.69, 28.58 | R2=0.72; P<0.01 | 8.2±12.2 | −16.08, 32.5 | R2=0.76; P<0.01 |
| CT | 84.1±20.6 | 4.1±14 | −23.21, 31.73 | R2=0.64; P<0.01 | 9.8±14.5 | −18.58, 38.62 | R2=0.60; P<0.01 |
| CTLAV | 84.9±20.5 | 3.2±13.5 | −23.10, 29.9 | R2=0.67; P<0.01 | 9.0±14.1 | −18.69, 37.03 | R2=0.60; P<0.01 |
Values are represented as mean ± SD. COPD, chronic obstructive pulmonary disease; %DLCO, percent predicted lung diffusion capacity for carbon monoxide; LAV, low-attenuation volume; Limit of agreement, mean ± 2SD; M, months; po, postoperative value; ppo, predicted postoperative value.