Table 1. Prevalence of gingival inflammation (mean G-lndex≥0.5) according to age per city.

Age (years)	PORTO ALEGRE**		TUCUMÁN		SANTIAGO		TOTAL**
	Gingival Inflammation		Gingival Inflammation		Gingival Inflammation		Gingival Inflammation		Total
	n	(%)	n	(%)	n	(%)	n	(%)	n	(%)
18–19	24	100	29	93.5	24	100	77	97.5	79	4.8
20–29	98	94.2	125	85.0	126	99.2	349	92.3	378	22.9
30–39	115	96.6	115	91.3	101	98.1	331	95.1	348	21.1
40–49	102	95.3	86	94.5	102	100	290	96.7	300	18.2
>50	196	100	142	91.6	192	99.0	530	97.3	545	33.0
Total	535	97.3*	497	90.4*	545	99.1*	1 577	95.6	1 650	100

^*p-value <0.001, Fisher's exact test to assess differences between prevalence of gingival inflammation Tucumán versus P. Alegre and Santiago

^**p-value <0.05, Fisher's exact test to assess differences between prevalence of gingival inflammation and age