Table 1.
Homogeneity and comparison of demographic data and comorbidities between groups.
| Homogeneity | Visible bis group N = 98 | Hidden bis group N = 102 | P |
|---|---|---|---|
| Age; years | 74.99 ± 6.77 | 75.75 ± 6.3 | 0.388 |
| Male | 51.49% (52) | 48.51% (49) | 0.119 |
| Female | 46.46% (46) | 53.53% (53) | |
| Weight; kg | 71.9 ± 15.3 | 73.6 ± 13.2 | 0.265 |
| ASA status: I and II | 51.02% (50) | 49.01% (50) | 0.992 |
| ASA status: III and IV | 48.98% (48) | 50.98% (52) | |
| Taking any antiaggregant or anticoagulant | 42.85% (42) | 46.07% (47) | 0.058 |
| Taking neuroleptic and antidepressive drugs | 42.7% (35) | 53.4% (63) | 0.136 |
| Number of drugs prescribed | 4.49 ± 3.03 | 5.00 ± 2.84 | 0.149 |
| Preexisting medical conditions | |||
| Cardiovascular | 67.3% (66) | 76.5% (78) | 0.151 |
| Respiratory | 31.6% (31) | 36.3% (37) | 0.489 |
| Endocrinological-renal | 77.6% (76) | 76.5% (78) | 0.856 |
| Neurological | 35.7% (35) | 40.2% (41) | 0.514 |
Patient characteristics at entry of the trial.
Values are number (%) or mean ± SD.
ASA indicates patients' scores on the ASA anaesthesia risk assessment scale.