Table 2. Comparison between the types of surgery in relation to the grip strength measured by the Jamar dynamometer by follow-up time.

Jam		Mean	Median	Standard Deviation	VC	Min	Max	N	CI	p-value
T0	Open	27.0	26	9.0	33%	12	44	28	3.3	0.002
	Zeta	20.5	18	4.9	24%	12	30	27	1.8
T30	Open	24.2	22	9.3	38%	8	40	28	3.4	0.003
	Zeta	18.1	18	4.8	27%	12	30	27	1.8
T90	Open	26.5	27	8.9	33%	10	40	28	3.3	<0.001
	Zeta	19.3	18	4.5	23%	10	28	27	1.7
T180	Open	27.3	27	8.9	33%	10	40	28	3.3	0.004