Table 1

 Characteristics of the patient sample at presentation; values are number (%) unless otherwise stated

Men (n = 154)Women (n = 277)Total (n = 431)
*History of IDA within five years of the index date but not within the immediate 12 months before that date. IQR, interquartile range.
Median age at index date (years)727675
    IQR63–7966–8265–81
Median haemoglobin at index date (g/l)948992
    IQR76–10977–10176–103
History of anaemia*39 (25)87 (31)126 (29)
History of any gastrointestinal complaint89 (58)128 (46)217 (50)
Symptomatic presentation130 (84)228 (82)358 (83)
Symptomatic patients with documented symptoms of anaemia68 (52)140 (61)208 (58)
Symptomatic patients with documented upper gastrointestinal symptoms31 (24)20 (9)51 (14)
Symptomatic patients with documented lower gastrointestinal symptoms25 (19)30 (13)55 (15)