Table 3.

Results for the multilevel model at T1 with cumulated defined daily doses (DDD) of PPI at T0 as a covariate (ANCOVA model).

	Estimate	Standard error	Statistic	df	p
Intercept	61.43	7.20	8.54	2178.72	< 0.0001
control	37.16	8.15	4.56	1629.96	< 0.0001
DDD T0	0.55	0.02	30.25	1875.32	< 0.0001