There was a significant increase in omeprazole use during the study of 0.24 [ 95 per cent confidence interval ( CI ) +0.19 to +0.29 ] dose units per year but no effect from the offer [ -0.02 ( 95 per cent CI -0.12 to +0.08 ) dose units ] or acceptance of a visit [ -0.03 ( 95 per cent CI -0.15 to +0.08 ) dose units ] .
