Table 5

Unadjusted incidence of oesophagitis, ulcers and IBD in women who were iron deficient compared with those who were not iron deficient

Iron deficientNon-iron deficientP value
Sample size (n)Pathology* (n)Incidence/1000 patients
(95% CI)
Sample size (n)Pathology* (n)Incidence/1000 patients
(95% CI)
Anaemic women
(n=9783)
 Oesophagitis
  Age 20–49 years662710015.09 (12.42 to 18.32)31566620.91 (16.47 to 26.52)0.04
  20–29379615.83 (7.28 to 34.10)26927.43 (2.04 to 26.70)0.48
  30–3916562816.91 (11.72 to 24.33)9352425.67 (17.31 to 37.91)0.13
  40–4945926614.37 (11.31 to 18.24)19524020.49 (15.08 to 27.78)0.07
 Ulcer
  Age 20–49 years6627598.90 (6.91 to 11.47)31564112.99 (9.59 to 17.58)0.06
  20–2937912.64 (0.47 to 14.79)269311.15 (3.80 to 32.27)0.31
  30–391656106.04 (3.28 to 11.08)93566.42 (2.94 to 13.93)0.90
  40–4945924810.45 (7.89 to 13.83)19523216.39 (11.64 to 23.05)0.045
 IBD
  Age 20–49 years6627243.62 (2.43 to 5.38)3156144.44 (2.64 to 7.43)0.54
  20–2937912.64 (0.47 to 14.79)26913.72 (0.66 to 20.75)>0.99
  30–39165653.02 (1.29 to 7.05)93544.28 (1.66 to 10.95)0.73
  40–494592183.92 (2.48 to 6.19)195294.61 (2.43 to 8.74)0.69
Non-anaemic women
(n=22 657)
 Oesophagitis
  Age 20–49 years69798211.75 (9.48 to 14.56)15 67822114.10 (12.37 to 16.06)0.16
  20–29101065.94 (2.73 to 12.90)2122178.01 (5.01 to 12.79)0.53
  30–3920682210.64 (7.04 to 16.06)50765611.03 (8.51 to 14.30)0.88
  40–4939015413.84 (10.63 to 18.02)848014817.45 (14.88 to 20.47)0.14
 Ulcer
  Age 20–49 years6979588.31 (6.43 to 10.73)15 678976.19 (5.07 to 7.54)0.07
  20–29101032.97 (1.01 to 8.70)212283.77 (1.91 to 7.42)>0.99
  30–392068178.22 (5.14 to 13.13)5076265.12 (3.50 to 7.49)0.12
  40–493901389.74 (7.11 to 13.34)8480637.43 (5.81 to 9.49)0.18
 IBD
  Age 20–49 years6979304.30 (3.01 to 6.13)15 678654.15 (3.25 to 5.28)0.87
  20–2910100212273.30 (1.60 to 6.79)0.10
  30–39206862.90 (1.33 to 6.32)5076152.96 (1.79 to 4.87)0.97
  40–493901246.15 (4.14 to 9.14)8480434.95 (3.67 to 6.69)0.45
  • Comparisons were made using Fisher’s exact tests.

  • –, not applicable.

  • *Within 5 years of the iron deficiency test date.

  • IBD, inflammatory bowel disease.