Table 1.

Demographic data of patients subjected to gingivectomies using lignocaine 2% (LIG), lignocaine 2% with adrenaline 1 : 160 000 (LIGA160) or lignocaine 2% with adrenaline 1 : 80 0000 (LIGA80) as local anaesthetic.

	LIG vs LIGA160	LIGA160 vs LIGA80	LIG vs LIGA80
n	66	63	66
Age (years)	48 (31–70)	50 (26–72)	49 (32–75)	NS§
Ratio females/males	37/29	36/27	35/31	NS#
% females/males	56.1/43.9	57.1/42.9	53.0/47.0	–

Mean age (range) is shown. Significance level 5%. NS No statistically significant difference between any group.

^§Data analysed with one-wayanova, and Scheffé's test.

^#Data analysed with two-sided Chi-Square test.