Table 1. Preoperative and postoperative variables according to bladder outlet obstruction index (BOOI).
| Equivocal BOO group | Definite BOO group | |||||
|---|---|---|---|---|---|---|
| Preoperation | Postoperation | P value | Preoperation | Postoperation | P value | |
| Qmax (ml s−1) | 11.09±4.49* | 16.38±5.36 | 0.001 | 7.97±3.37 | 16.44±5.75 | 0.001 |
| PVR (ml) | 55.80±72.46 | 36.99±5.03 | 0.102 | 74.23±82.95 | 31.71±3.54 | 0.941 |
| IPSSI | 8.57±4.43 | 3.49±0 .47 | 0.001 | 9.51±3.74 | 4.51±3.22 | 0.001 |
| IPSSO | 12.75±5.65 | 4.95±0.67 | 0.001 | 14.36±4.50 | 5.97±4.85 | 0.001 |
| Age (years) | 69.85±7.43 | 69.94±7.53 | ||||
| DOA (+) | 11* | 30 | ||||
| PdetQmax | 41.15±15.40* | 64.90±28.55 | ||||
| Pdetmax | 51.01±12.10* | 83.72±27.73 | ||||
| MBC on CMG (ml) | 354.25±63.28* | 316.57±88.34 | ||||
| First sense (ml) | 191.69±87.40 | 171.14±72.96 | ||||
| Total volume (g) | 48.60±22.63 | 51.70±22.78 | ||||
| TZV (g) | 24.83±17.22 | 29.11±18.13 | ||||
Abbreviations: BOO, bladder outlet obstruction; CMG, cystometrogram; DOA, detrusor overactivity; PVR, post-void residual urine volume; IPSS, International Prostate Symptom Score; IPSSI, IPSS irritative subdomain score; IPSSO, IPSS obstructive subdomain score; MBC, maximal bladder capacity; PdetMax, maximal detrusor pressure; PdetQmax, maximal detrusor pressure at maximal flow rate; Qmax, maximal flow rate; TZZ, transitional zone volume.
*P<0.05, compared with preoperative data of definite BOO group.