| Total | Mean (SD) | Mean difference (95% CI) | p value |
---|---|---|---|---|
H. pylori IgG sero-status | Â | Â | Â | 0.016* |
 H. pylori negative | 154 | 6.65 (0.66) | Reference |  |
 H. pylori positive | 780 | 6.78 (0.60) | 0.13 (0.02, 0.24) |  |
H. pylori/CagA IgG sero-status | df = 2 | Â | Â | 0.023** |
 H. pylori negative | 154 | 6.65 (0.66) | Reference |  |
 H. pylori positive CagA negative | 452 | 6.76 (0.60) | 0.1 (− 0.01, 0.22) | 0.19*** |
 H. pylori positive CagA positive | 328 | 6.82 (0.59) | 0.16 (0.05, 0.28) | 0.018*** |
Atrophic gastritis (PGI < 30 μg/L or PGI:PGII < 3.0)§ |  |  |  | 0.011* |
 No | 846 | 6.78 (0.60) | − 0.18 (− 0.32, − 0.04) |  |
 Yes | 81 | 6.60 (0.65) | Reference |  |
H. pylori sero-status/atrophic gastritis**** § | df = 3 |  |  | 0.002** |
 H. pylori negative no atrophic gastritis | 115 | 6.72 (0.63) | Reference |  |
 H. pylori positive no atrophic gastritis | 731 | 6.79 (0.60) | 0.07 (− 0.05, 0.18) | 1.0**** |
 H. pylori positive plus atrophic gastritis | 44 | 6.77 (0.58) | 0.05 (− 0.16, 0.26) | 1.0**** |
Past H. pylori infection (IgG sero-negatives) plus atrophic gastritis | 37 | 6.40 (0.67) | − 0.32 (− 0.55, − 0.10) | 0.028**** |