Expectedly , the ICB group required fewer needle passes ( 2 vs 6 ; P < 0.001 ) as well as shorter needling [ 4.8 ( 2.3 ) vs 9.0 ( 2.9 ) minutes ; P < 0.001 ] and performance [ 5.6 ( 2.3 ) vs 9.5 ( 2.9 ) minutes ; P < 0.001 ] times .