Table 5. ppoFEV1, mean differences between the ppo and po values at 3 and 12 months after lobectomy and the limit of agreement.
| Method of estimation | ppoFEV1 (L) | Mean difference with poFEV1 (L), 3M | Limit of agreement −2SD, 2SD (%) | Determination coefficient | Mean difference with poFEV1 (L), 12M | Limit of agreement −2SD, 2SD (%) | Determination coefficient |
|---|---|---|---|---|---|---|---|
| RUL | |||||||
| S | 1.94±0.43 | −0.01±0.22 | −0.45, 0.43 | R2=0.77; P<0.01 | −0.00±0.25 | −0.50, 0.49 | R2=0.55; P<0.01 |
| Q | 1.90±0.19 | 0.02±0.19 | −0.36, 0.41 | R2=0.79; P<0.01 | 0.03±0.25 | −0.47, 0.53 | R2=0.56; P<0.01 |
| CT | 1.83±0.45 | 0.10±0.2 | −0.30, 0.5 | R2=0.80; P<0.01 | 0.11±0.27 | −0.43, 0.65 | R2=0.54; P<0.01 |
| CTLAV | 1.85±0.48 | 0.08±0.2 | −0.33, 0.48 | R2=0.80; P<0.01 | 0.08±0.27 | −0.46, 0.62 | R2=0.58; P<0.01 |
| RLL | |||||||
| S | 1.60±0.38 | 0.15±0.26 | −0.37, 0.67 | R2=0.62; P<0.01 | 0.24±0.27 | −0.30, 0.78 | R2=0.69; P<0.01 |
| Q | 1.61±0.4 | 0.14±0.25 | −0.36, 0.63 | R2=0.65; P<0.01 | 0.23±0.27 | −0.31, 0.77 | R2=0.72; P<0.01 |
| CT | 1.72±0.48 | 0.03±0.26 | −0.48, 0.55 | R2=0.78; P<0.01 | 0.12±0.29 | −0.46, 0.71 | R2=0.79; P<0.01 |
| CTLAV | 1.72±0.48 | 0.03±0.25 | −0.48, 0.53 | R2=0.78; P<0.01 | 0.12±0.29 | −0.46, 0.7 | R2=0.79; P<0.01 |
| LUL | |||||||
| S | 1.69±0.31 | 0.09±0.21 | −0.33, 0.52 | R2=0.60; P<0.01 | 0.17±0.27 | −0.38, 0.72 | R2=0.42; P<0.01 |
| Q | 1.67±0.32 | 0.12±0.22 | −0.33, 0.57 | R2=0.53; P<0.01 | 0.19±0.29 | −0.39, 0.77 | R2=0.35; P<0.01 |
| CT | 1.58±0.29 | 0.19±0.23 | −0.27, 0.67 | R2=0.52; P<0.01 | 0.26±0.28 | −0.30, 0.84 | R2=0.29; P<0.01 |
| CTLAV | 1.61±0.29 | 0.16±0023 | −0.29, 0.64 | R2=0.52; P<0.01 | 0.24±0.28 | −0.33, 0.82 | R2=0.29; P<0.01 |
| LLL | |||||||
| S | 1.79±0.37 | −0.04±0.44 | −0.92, 0.84 | R2=0.27; P<0.01 | 0.02±0.48 | −0.84, 0.97 | R2=0.32; P=0.06 |
| Q | 1.77±0.37 | −0.03±0.43 | −0.88, 0.83 | R2=0.27; P<0.01 | 0.04±0.48 | −0.92, 0.99 | R2=0.32; P=0.06 |
| CT | 1.81±0.38 | −0.05±0.44 | −0.93, 0.79 | R2=0.23; P<0.01 | 0.01±0.48 | −0.97, 0.95 | R2=0.30; P=0.07 |
| CTLAV | 1.82±0.38 | −0.05±0.44 | −0.93, 0.78 | R2=0.23; P<0.01 | 0.01±0.48 | −0.97, 0.95 | R2=0.30; P=0.07 |
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; FEV1, forced expiratory volume in one second; LAV, low-attenuation volume; Limit of agreement, mean ± 2 SD; M, months; po, postoperative value; ppo, predicted postoperative value.