Compared with OEC group , the MECS group had a shorter operating time ( 18.6 2.9 vs 54.5 7.0 minutes ; P < .05 ) , shorter incision length ( 1.1 0.2 vs 4.8 0.6 cm ; P < .05 ) , and less blood loss ( 4.6 1.6 vs 17.0 3.1 g ; P < .05 ) .