Table 1

 Age and sex distribution among cases with reflux symptoms and control subjects without reflux symptoms

Men (%)Women (%)Total (%)
Number of subjects
    Cases1555 (7.6)1598 (6.9)3153 (7.3)
    Controls18814 (92.4)21396 (93.1)40210 (9.7)
Mean age (years)
    Cases505352
    Controls484748
Age range (years)
    Cases19–10120–9219–101
    Controls19–9919–9519–99