The association between late-onset keratitis in congenital cytomegalovirus infection: A nationwide population-based cohort study

Abstract

Aim

To estimate the relationship between congenital cytomegalovirus (CMV) infection and late-onset keratitis via use of the National Health Insurance Research Database (NHIRD) of Taiwan.

Methods

We yielded this retrospective cohort study and subjects with congenital CMV infection, which according to the diagnostic codes and laboratory exam, were selected as our study group that diagnosed with congenital CMV infection. Each participant in the study group was matched to four individuals without the non-congenital CMV infection by propensity-score matching (PSM) process and the latter served as the control group. The main outcome is the late-onset keratitis that occurs one year after the congenital CMV infection diagnosis. We applied Cox proportional hazard regression to produce the adjusted hazard ratio (HR) and corresponding 95% confidence interval (CI) of late-onset keratitis between two groups.

Results

There were 426 (7.4%) and 1,516 (6.5%) events of keratitis in the study and control groups. The study group revealed significantly higher ratio of late-onset keratitis than control group after adjusting many confounders (adjusted HR: 1.14, 95% CI: 1.02–1.27), and the cumulative probability of keratitis in the study group was also higher than control group. For the subgroup analysis, the existence of severe congenital CMV infection was significantly correlated to the late-onset keratitis in individuals with congenital CMV infection (adjusted HR: 1.48, 95% CI: 1.01–2.70; P < 0.05).

Conclusion

The congenital CMV infection is related to higher rate of late-onset keratitis, especially for those with severe form.

Keywords

Congenital cytomegalovirus infection gestational age birth weight keratitis

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