Table 6 Operation details and treated lesions of the initial BPA session
|  | First BPA sessions (N = 92) | Unilateral BPA (N = 54) | Bilateral BPA (N = 38) | *p value |
|---|---|---|---|---|
Operation details | ||||
 Operation duration (minutes) | 231.1 ± 63.5 | 232.5 ± 58.4 | 229.0 ± 70.8 | 0.80 |
 The amount of contrast media given (ml) | 220.0 (180.0, 270.0) | 230.0 (180.0, 300.0) | 230.0 (200.0, 260.0) | 1.00 |
 Dose area product (μGy m2) | 1550.6 (951.1, 3450.1) | 1550.6 (1090.0, 3485.4) | 1560.1 (916.7, 3480.6) | 0.90 |
 Largest balloon size used/session (mm) | 3.5 (3.0, 4.5) | 4.0 (2.9, 4.6) | 3.0 (3.0, 4.3) | 0.62 |
 Vessels treated/session | 7.0 (4.3, 9.0) | 6.0 (4.0, 8.0) | 8.0 (5.8, 9.3) | 0.04 |
 Total number of lobes treated (Lobes treated/session) | 220 [2 (2, 3)] | 103 [2 (1, 2)] | 117 [3 (2, 4)] | < 0.001 |
 Total number of left/right lower lobes treated (%) | 124 (56.3) | 51 (49.5) | 73 (62.4) | 0.06 |
Lesion type (treated lesions/session) | ||||
 Total number of treated lesions | 738 [8 (5, 10)] | 393 [7 (4, 10)] | 345 [9 (6, 12)] | 0.02 |
 Ring-like stenosis | 64 [0 (0, 1)] | 46 [0 (0, 2)] | 18 [0 (0, 1)] | 0.07 |
 Web lesions | 575 [6 (3.3, 8)] | 289 [5 (3, 7)] | 286 [7.5 (5, 10)] | 0.004 |
 Subtotal occlusion | 71 [1 (0, 1)] | 41 [1 (0, 1)] | 30 [0.5 (0, 2)] | 0.99 |
 Total occlusion | 28 [0 (0, 0)] | 17 [0 (0, 0)] | 11 [0 (0, 0)] | 0.72 |
Lesion location (treated lesions/session) | ||||
 Lobar arteries | 5 | 4 | 1 |  |
 Segmental arteries | 180 [2 (0, 3)] | 94 [1.5 (0, 3)] | 86 [2 (0, 4)] | 0.34 |
 Subsegmental arteries | 553 [5 (4, 8)] | 295 [5 (3, 8)] | 258 [6 (4, 10)] | 0.13 |