Table 4.
The association between H. pylori infection and the type of anemia in the study.
| Type | Total | H. pylori (+) | H. pylori (−) | Crude | Adjusted a | ||||
|---|---|---|---|---|---|---|---|---|---|
| n (%) | OR | 95%CI | P | OR | 95%CI | P | |||
| Model 1 in all the subjects | |||||||||
| No anemia | 16841 (94.8) | 7376 (94.5) | 9465 (94.8) | 1 | 1 | ||||
| NA | 644 (3.6) | 293 (3.7) | 352 (3.5) | 1.06 | 0.91, 1.25 | 0.44 | 1.25 | 1.04, 1.49 | 0.017 |
| LCA | 50 (0.3) | 23 (0.3) | 27 (0.3) | 1.09 | 0.63, 1.91 | 0.75 | 0.89 | 0.49, 1.63 | 0.71 |
| SCA | 47 (0.3) | 17 (0.2) | 30 (0.3) | 0.73 | 0.40, 1.32 | 0.29 | 1.10 | 0.56, 2.14 | 0.78 |
| MHA | 209 (1.2) | 96 (1.2) | 103 (1.3) | 1.09 | 0.83, 1.43 | 0.54 | 1.18 | 0.87, 1.62 | 0.29 |
| Model 2 in the male subjects | |||||||||
| No anemia | 11646 (97.5) | 5334 (97.4) | 6312 (97.6) | 1 | 1 | ||||
| NA | 223 (1.9) | 109 (2.0) | 114 (1.8) | 1.13 | 0.87, 1.48 | 0.36 | 1.17 | 0.87, 1.56 | 0.29 |
| LCA | 37 (0.3) | 16 (0.3) | 21 (0.3) | 0.90 | 0.47, 1.73 | 0.76 | 0.79 | 0.39, 1.59 | 0.51 |
| SCA | 8 (0.1) | 3 (0.1) | 5 (0.1) | 0.71 | 0.17, 1.97 | 0.64 | 0.85 | 0.19, 3.79 | 0.83 |
| MHA | 33 (0.3) | 17 (0.3) | 16 (0.3) | 1.26 | 0.64, 2.49 | 0.51 | 1.07 | 0.50, 2.27 | 0.87 |
| Model 3 in the female subjects | |||||||||
| No anemia | 5195 (88.9) | 2042 (87.8) | 3153 (89.6) | 1 | 1 | ||||
| NA | 421 (7.2) | 183 (7.9) | 238 (6.8) | 1.19 | 0.97, 1.45 | 0.094 | 1.28 | 1.02, 1.60 | 0.035 |
| LCA | 13 (0.2) | 7 (0.3) | 6 (0.2) | 1.80 | 0.61, 5.37 | 0.29 | 1.26 | 0.38, 4.15 | 0.71 |
| SCA | 39 (0.7) | 14 (0.6) | 25 (0.7) | 0.87 | 0.45, 1.67 | 0.66 | 1.18 | 0.56, 2.49 | 0.66 |
| MHA | 176 (3.0) | 79 (3.4) | 97 (2.8) | 1.26 | 0.93, 1.70 | 0.14 | 1.22 | 0.87, 1.73 | 0.25 |
aAdjusted OR and 95%CI were calculated by adjusting for the potential confounders, including age, sex, underlying diseases and BMI.
NA, normocytic anemia; SCA, simple small cell anemia; LCA, large cell anemia; MHA, microcytic hypochromic anemia.