Table 4 Sensitivity analysis for the aHRs stratified by follow-up time interval, sex, and age groups.

From: Influence of Helicobacter pylori infection on risk of rheumatoid arthritis: a nationwide population-based study

 

N

Incidence rate (95% CI) of RA

aHRa (95% CI)

Control

H. pylori-infected group

Follow-up time interval

 Index date to 12 months

195,066

1.03 (0.86–1.23)

1.62 (1.41–1.87)

1.58 (1.26–1.99)

 12–60 months

192,757

0.76 (0.69–0.84)

1.08 (1–1.18)

1.43 (1.25–1.62)

 > 60 months

151,851

0.97 (0.89–1.06)

1.39 (1.3–1.49)

1.44 (1.29–1.61)

 p for interaction

   

0.9919

Sex

 Female

84,584

1.29 (1.2–1.39)

1.9 (1.79–2.02)

1.48 (1.34–1.63)

 Male

110,482

0.56 (0.51–0.62)

0.78 (0.72–0.85)

1.38 (1.21–1.58)

 p for interaction

   

0.4744

Age on the index date

 < 30

21,108

0.2 (0.14–0.29)

0.45 (0.35–0.57)

2.19 (1.41–3.38)

 30–44

56,159

0.62 (0.55–0.71)

0.88 (0.79–0.98)

1.40 (1.18–1.65)

 45–64

88,718

1.09 (1–1.18)

1.63 (1.52–1.74)

1.50 (1.35–1.67)

 ≥ 65

29,081

1.48 (1.3–1.69)

1.83 (1.63–2.06)

1.25 (1.05–1.49)

 p for interaction

   

0.0860

  1. aaHR, adjusted hazard ratio.
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