Patients with a pigtail catheter had significantly lower mean ( s.d. ) tube-site pain scores than those with a chest tube , at baseline after tube insertion ( 3.2 ( 0.6 ) versus 7.7 ( 0.6 ) ; P < 0.001 ) , on day 1 ( 1.9 ( 0.5 ) versus 6.2 ( 0.7 ) ; P < 0.001 ) and day 2 ( 2.1 ( 1.1 ) versus 5.5 ( 1.0 ) ; P = 0.040 ) .