Effectiveness of oral clonidine and gabapentin on peripheral neuropathy in diabetic patients in southwestern Iran: a randomized clinical trial

Table 4 The ANCOVA results for comparing the neuropathic pain between the study groups in the second, third, and fourth assessment stages

Index stage	Source	SS	df	MS	F	P-value	Partial Eta Squared
Second assessment	Pre-test	338.48	1	338.48	65.63	< 0.001	0.71
	Group	279.91	1	279.91	54.27	< 0.001	0.67
	Error	139.26	27	5.16
	Total	9829	30
Third assessment	Pre-test	125.26	1	125.26	12.09	0.002	0.31
	Group	373.99	1	373.99	36.09	< 0.001	0.57
	Error	279.81	27	10.36
	Total	6050	30
Fourth assessment	Pre-test	116.83	1	116.83	11.49	0.002	0.30
	Group	526.74	1	526.74	51.78	< 0.001	0.66
	Error	274.63	27	10.17
	Total	5003	30

* Effect Size: A numerical value that determines the difference between data and a statistical hypothesis

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