Duplication of Single Study with Different Parameter Values

[Degoot-AM]

The epiparameter_db function returns multiple entries for the same study with differing parameter values for the serial interval of Mpox. Specifically, the following issue was identified:
Running epiparameter_db(disease = "mpox", epi_name = "serial interval") returns 5 results. Two entries are attributed to the same study (Madewell et al., 2022) but report different parameter values for the Gamma distribution:

epiparameter_db(disease = "mpox", epi_name = "serial interval")

[athowes]

I found that this is also the case (duplicated studies with different parameter values) looking at:

epiparameter_db(disease = "RSV")

[jamesmbaazam]

Thanks for reporting @athowes. I was coming to report the same issue. Below is a reprex

epiparameter::epiparameter_db(disease = "RSV", author = "reich")
#> Returning 2 results that match the criteria (2 are parameterised). 
#> Use subset to filter by entry variables or single_epiparameter to return a single entry. 
#> To retrieve the citation for each use the 'get_citation' function
#> # List of 2 <epiparameter> objects
#> Number of diseases: 1
#> ❯ RSV
#> Number of epi parameters: 1
#> ❯ incubation period
#> [[1]]
#> Disease: RSV
#> Pathogen: RSV
#> Epi Parameter: incubation period
#> Study: Reich N, Lessler J, Cummings D, Brookmeyer R (2009). "Estimating
#> incubation period distributions with coarse data." _Statistics in
#> Medicine_. doi:10.1002/sim.3659 <https://doi.org/10.1002/sim.3659>.
#> Distribution: lnorm (days)
#> Parameters:
#>   meanlog: 1.484
#>   sdlog: 0.223
#> 
#> [[2]]
#> Disease: RSV
#> Pathogen: RSV
#> Epi Parameter: incubation period
#> Study: Reich N, Lessler J, Cummings D, Brookmeyer R (2009). "Estimating
#> incubation period distributions with coarse data." _Statistics in
#> Medicine_. doi:10.1002/sim.3659 <https://doi.org/10.1002/sim.3659>.
#> Distribution: lnorm (days)
#> Parameters:
#>   meanlog: 1.484
#>   sdlog: 0.215
#> 
#> # ℹ Use `parameter_tbl()` to see a summary table of the parameters.
#> # ℹ Explore database online at: https://epiverse-trace.github.io/epiparameter/articles/database.html

^{Created on 2025-05-09 with reprex v2.1.1}