Effect of minimally invasive cardiac surgery compared with conventional surgery on post-operative physical activity and rehabilitation in patients with valvular heart disease

Egyptian Rheumatology and Rehabilitation

Table 4 The result of 6MWT in both groups before and after surgery

6MWT		Conventional surgery group	MICS group	Test value	P-value	Sig.
6MWT		No. = 25	No. = 25	Test value	P-value	Sig.
Pre operative	Mean ± SD	340.88 ± 69.53	346.72 ± 55.76	-0.328•	0.745	NS
Pre operative	Range	209 – 493	289 – 488	-0.328•	0.745	NS
Post operative	Mean ± SD	410.56 ± 86.61	506.56 ± 86.92	-3.912•	<0.001	HS
Post operative	Range	291 – 596	339 – 632	-3.912•	<0.001	HS
Difference	Mean ± SD	69.68 ± 56.11	159.84 ± 77.35	-3.784‡	<0.001	HS
Difference	Range	6 – 197	6 – 312	-3.784‡	<0.001	HS
Paired t-test		6.209	10.333
P-value		<0.001 (HS)	<0.001 (HS)

6MWT: Sex minute walking test, MICS group: Minimally invasive cardiac surgery group
P is significant at ≤ 0.05, P is highly significant (HS) at ≤ 0.01, and P is non-significant at > 0.05
^*: Chi-square test‡: Mann Whitney test