Table 2.

Comparison of surgical indexes between the two groups

Index	Traditional group n = 43	Modified group n = 37	95% CI of difference	Statistics (t)
Time of the craniotomy (min)	34.19 ± 4.55	29.68 ± 4.89	2.48 to 6.54	4.270
Intracranial operation time (min)	28.33 ± 2.30	27.65 ± 3.42	−0.61 to 1.97	1.056
Time to close the skull (min)	28.95 ± 2.54	25.22 ± 3.12	2.48 to 4.98	5.893
Length of surgical incision (mm)	70.84 ± 11.27	59.69 ± 10.71	6.21 to 16.09	4.514

95% CI of Difference refers to the 95% Confidence Interval for the difference between the means of the traditional and modified groups. Post-hoc power analysis for ‘Time of the craniotomy,’ ‘Time to close the skull,’ and ‘Length of surgical incision’ yielded power > 0.99