Table 2. Temporal trends for absolute number (A) and prevalence (B) (adjusted to the population × 100.000 people) of stone-related hospitalizations in Brazil between 1998 and 2012 according to age strata.

A		(1998)	(2012)	% Variation	EAPC [95% CI]	p-value
Brazil
	0 to 19 years	6089	4757	−21.87%	−0,26% [−0,32;0,11]	<0.001
	20 to 39 years	27856	26671	−4.25%	−0,60% [−0,65;−0,55]	<0.001
	40 to 59 years	16933	25607	+ 51.2%	0,65% [0,53;0,76]	<0.001
	60 to 79 years	6349	9240	+ 45.5%	0,21% [0,18;0,24]	<0.001
	≥ 80 years	938	1031	+ 9.91%	0,01% [−0,34;0,35]	0.976
B		(1998)	(2012)	% Variation	EAPC [95% CI]	p-value
Brazil
	0 to 19 years	8.9	7.4	−16.73%	−0.16 [−0.28;−0.04]	0.012
	20 to 39 years	53.3	41	−23.17%	−0.12 [−1.75;−0.70]	<0.001
	40 to 59 years	60.1	58.2	−3.06%	−0.59 [−1.20;0.03]	0.060
	60 to 79 years	56.8	51.6	−9.26%	−0.71 [−1.54;0.12]	0.087
	≥ 80 years	61.3	34.6	−43.44%	−2.33 [−4.27;−0.39]	0.022