Pain and Efficacy Rating of a Microprocessor-Controlled Metered Injection System for Local Anaesthesia in Minor Hand Surgery

Table 3

Results for comparison of primary outcome measures (VAS) using single-sided t-test for visual analog scales broken into ten category divisions. See Table 1 for questions.

	Microprocessor-controlled injection	Traditional method of injection	𝑃 value
	𝑛=20 [Mean (SD)]	𝑛=20 [Mean (SD)]
Question  1	2.7 (2.3)	3.4 (2.3)	.38
Question  2	2.4 (2.2)	3.0 (2.3)	.36
Question  3	1.5 (1.6)	1.4 (0.8)	.81
Question  4	1.3 (0.7)	1.4 (0.8)	.69
Question  5	3.6 (3.5)	4.0 (2.9)	.73
Question  6	1.9 (1.7)	2.1 (1.5)	.77
Question  7	1.7 (1.3)	1.8 (1.2)	.80