Table 2.

General data of the three groups

Tönnis grade	Age (range, years)	Operative time (min)	Estimated operative blood loss (ml)
Group T0	31.08 ± 9.88 (19–47)	98.75 ± 17.21	801.67 ± 263.09
Group T1	37.30 ± 8.50 (21–45)	98.00 ± 24.29	842.00 ± 272.06
Group T2	45.00 ± 3.63a (39–49)	117.50 ± 28.94	750.00 ± 148.46

^aT2 vs. T0, p = 0.003. All values are expressed as mean ± standard deviation. Differences are considered significant at p < 0.05