Table 4.

comparison, showing duration of drainage and length of hospital stay in the study groups

Variables of patients	Patient groups	Mean	Standard deviation	Standard error mean	p-value for significance
Duration of drainage(days)	Flutter bag	6.5	2.6	0.6	*0.059
	Underwater seal	7.9	2.0	0.4
Length of hospital stay	Flutter bag	7.9	2.2	0.5	**0.019
	Underwater seal	9.8	2.7	0.6

^*P value >0.05.

^**p value <0.05

(Fishers exact test)