The Micro-hip group achieved a significantly lower mean incision length ( 9.3 vs. 13.4 cm , p < 0.001 ) , mean surgical time ( 60 vs. 68 minutes , p = 0.021 ) , mean reduction in haemoglobin level ( 2.1 vs. 2.8 g/dl , p < 0.001 ) , and mean VAS for pain from hour 6 to day 6 ( all p < 0.05 ) .