Table 5.

Proportion of complications according to grade comparing the present series to the cumulative total from the studies represented in Table 4

Classification according to Sink modification of Clavien-Dindo
Complication grade	Literature review	Present series (%)
I (deviation from normal postoperative course)	14 % (44/324)	23
II (requiring pharmacologic treatment)	29 % (94/324)	31
IIIa (intervention not under general anesthesia)	0.01 % (2/324)	3
IIIb (intervention under general anesthesia)	32 % (104/324)	40
IV (life threatening or long term orthopaedic dysfunction)	24 % (79/324)	3
V (death)	0.03 % (1/324)	0