R Under development (unstable) (2025-10-08 r88906 ucrt) -- "Unsuffered Consequences"
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> library(medicalcoder)
> 
> DF <- data.frame(code = c("B", "A"), patid = 1:2)[0, ]
> 
> out <- comorbidities(DF, icd.codes = "code", method = "charlson_quan2005")
Warning message:
'poa.var' and 'poa' are both NULL.  With flag.method = 'current' poa is set to 1. 
> stopifnot(
+   inherits(out, "medicalcoder_comorbidities"),
+   inherits(out, "data.frame"),
+   nrow(out) == 0L,
+   identical(names(out), c("aidshiv", "mal", "cebvd", "copd", "chf", "dem", "dmc", "dm", "hp", "mld", "msld", "mst", "mi", "pud", "pvd", "rnd", "rhd", "num_cmrb", "cmrb_flag", "cci", "age_score"))
+ )
> 
> out <- comorbidities(DF, icd.codes = "code", method = "elixhauser_ahrq2025")
Warning messages:
1: 'poa.var' and 'poa' are both NULL.  With flag.method = 'current' poa is set to 1. 
2: Assuming all codes provided are secondary diagnostic codes.  Define `primarydx.var` or `primarydx` if this assumption is incorrect. 
> stopifnot(
+   inherits(out, "medicalcoder_comorbidities"),
+   inherits(out, "data.frame"),
+   nrow(out) == 0L,
+   identical(
+     names(out),
+     c("AIDS", "ALCOHOL", "ANEMDEF", "AUTOIMMUNE", "BLDLOSS", "CANCER_LEUK",
+       "CANCER_LYMPH", "CANCER_METS", "CANCER_NSITU", "CANCER_SOLID", "CBVD",
+       "COAG", "DEMENTIA", "DEPRESS", "DIAB_CX", "DIAB_UNCX", "DRUG_ABUSE", "HF",
+       "HTN_CX", "HTN_UNCX", "LIVER_MLD", "LIVER_SEV", "LUNG_CHRONIC",
+       "NEURO_MOVT", "NEURO_OTH", "NEURO_SEIZ", "OBESE", "PARALYSIS", "PERIVASC",
+       "PSYCHOSES", "PULMCIRC", "RENLFL_MOD", "RENLFL_SEV", "THYROID_HYPO",
+       "THYROID_OTH", "ULCER_PEPTIC", "VALVE", "WGHTLOSS", "num_cmrb",
+       "cmrb_flag", "mortality_index", "readmission_index")
+   )
+ )
> 
> out <- comorbidities(DF, icd.codes = "code", method = "pccc_v3.1")
Warning message:
'poa.var' and 'poa' are both NULL.  With flag.method = 'current' poa is set to 1. 
> stopifnot(
+   inherits(out, "medicalcoder_comorbidities"),
+   inherits(out, "data.frame"),
+   nrow(out) == 0L,
+   identical(
+     names(out),
+     c("congeni_genetic_dxpr_only", "congeni_genetic_tech_only",
+       "congeni_genetic_dxpr_and_tech", "congeni_genetic_dxpr_or_tech",
+       "cvd_dxpr_only", "cvd_tech_only", "cvd_dxpr_and_tech", "cvd_dxpr_or_tech",
+       "gi_dxpr_only", "gi_tech_only", "gi_dxpr_and_tech", "gi_dxpr_or_tech",
+       "hemato_immu_dxpr_only", "hemato_immu_tech_only",
+       "hemato_immu_dxpr_and_tech", "hemato_immu_dxpr_or_tech",
+       "malignancy_dxpr_only", "malignancy_tech_only",
+       "malignancy_dxpr_and_tech", "malignancy_dxpr_or_tech",
+       "metabolic_dxpr_only", "metabolic_tech_only", "metabolic_dxpr_and_tech",
+       "metabolic_dxpr_or_tech", "misc_dxpr_only", "misc_tech_only",
+       "misc_dxpr_and_tech", "misc_dxpr_or_tech", "neonatal_dxpr_only",
+       "neonatal_tech_only", "neonatal_dxpr_and_tech", "neonatal_dxpr_or_tech",
+       "neuromusc_dxpr_only", "neuromusc_tech_only", "neuromusc_dxpr_and_tech",
+       "neuromusc_dxpr_or_tech", "renal_dxpr_only", "renal_tech_only",
+       "renal_dxpr_and_tech", "renal_dxpr_or_tech", "respiratory_dxpr_only",
+       "respiratory_tech_only", "respiratory_dxpr_and_tech",
+       "respiratory_dxpr_or_tech", "any_tech_dep", "any_transplant", "num_cmrb",
+       "cmrb_flag")
+   )
+ )
> 
> out <- comorbidities(DF, icd.codes = "code", method = "pccc_v3.1", subconditions = TRUE)
Warning message:
'poa.var' and 'poa' are both NULL.  With flag.method = 'current' poa is set to 1. 
> stopifnot(
+   inherits(out, "medicalcoder_comorbidities_with_subconditions"),
+   inherits(out, "medicalcoder_comorbidities"),
+   inherits(out[[1]], "data.frame"),
+   inherits(out[[2]], "list"),
+   nrow(out[[1]]) == 0L,
+   length(out[[2]]) == 11L,
+   sapply(out[[2]], nrow) == 0L
+ )
> 
> ################################################################################
> #                                 End of File                                  #
> ################################################################################
> 
> proc.time()
   user  system elapsed 
   3.14    0.28    3.39