# Pre-processing of clinical data for clinical data review report

#### Laure Cougnaud, Michela Pasetto

#### April 11, 2025

This vignette shows functionalities used for annotating and filtering the data within the `clinDataReview` package.

Utility functions to automate standard pre-processing steps of the data are available in the package.

Note that these functions are mainly useful in combination with the specification of the parameters in ‘config’ file in the clinical data reports (see the dedicated reporting vignette).

For this vignette, we will use example data available in the `clinUtils` package.

    library(clinDataReview)

# 1 Data format

The input dataset for the clinical data review should be a `data.frame` with clinical data. Such data is typically imported from SAS data file or xpt data file.
Such dataset can be imported for multiple files at once via the `clinUtils::loadDataADaMSDTM` function.

The label of the variables stored in the `SAS` datasets is also used for title/captions.

A few `ADaM` datasets are included in the `clinUtils` package for the demonstration, via the dataset `dataADaMCDISCP01` and corresponding variable labels.

    library(clinUtils)

    data(dataADaMCDISCP01)
    labelVars <- attr(dataADaMCDISCP01, "labelVars")

    dataLB <- dataADaMCDISCP01$ADLBC
    dataDM <- dataADaMCDISCP01$ADSL
    dataAE <- dataADaMCDISCP01$ADAE

# 2 Annotate data

The `annotateData` enables to add metadata for a specific domain/dataset.

    dataLBAnnot <- annotateData(
        data = dataLB,
        annotations = list(data = dataDM, vars = c("ETHNIC", "ARM")),
        verbose = TRUE
    )

    ## Data annotated with variable(s): ETHNIC ('ETHNIC'), ARM ('ARM') from the 'custom' dataset based on the variable(s):  USUBJID ('USUBJID').

    knitr::kable(
        head(dataLBAnnot),
        caption = paste("Laboratory parameters annotated with",
            "demographics information with the `annotatedData` function"
        )
    )

Laboratory parameters annotated with demographics information with the `annotatedData` function
STUDYID | SUBJID | USUBJID | TRTP | TRTPN | TRTA | TRTAN | TRTSDT | TRTEDT | AGE | AGEGR1 | AGEGR1N | RACE | RACEN | SEX | COMP24FL | DSRAEFL | SAFFL | AVISIT | AVISITN | ADY | ADT | VISIT | VISITNUM | PARAM | PARAMCD | PARAMN | PARCAT1 | AVAL | BASE | CHG | A1LO | A1HI | R2A1LO | R2A1HI | BR2A1LO | BR2A1HI | ANL01FL | ALBTRVAL | ANRIND | BNRIND | ABLFL | AENTMTFL | LBSEQ | LBNRIND | LBSTRESN | DATASET | ETHNIC | ARM
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Baseline | 0 | -9 | 2013-08-14 | SCREENING 1 | 1 | Sodium (mmol/L) | SODIUM | 18 | CHEM | 139.00 | 139.00 | NA | 132.0 | 147.0 | 1.053030 | 0.9455782 | 1.053030 | 0.9455782 |  | 81.50 | N | N | Y |  | 26 | NORMAL | 139.00 | ADLBC | NOT HISPANIC OR LATINO | Xanomeline High Dose
CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Baseline | 0 | -9 | 2013-08-14 | SCREENING 1 | 1 | Potassium (mmol/L) | K | 19 | CHEM | 4.00 | 4.00 | NA | 3.4 | 5.4 | 1.176471 | 0.7407407 | 1.176471 | 0.7407407 |  | 4.10 | N | N | Y |  | 19 | NORMAL | 4.00 | ADLBC | NOT HISPANIC OR LATINO | Xanomeline High Dose
CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Baseline | 0 | -9 | 2013-08-14 | SCREENING 1 | 1 | Chloride (mmol/L) | CL | 20 | CHEM | 109.00 | 109.00 | NA | 94.0 | 112.0 | 1.159574 | 0.9732143 | 1.159574 | 0.9732143 |  | 62.00 | N | N | Y |  | 11 | NORMAL | 109.00 | ADLBC | NOT HISPANIC OR LATINO | Xanomeline High Dose
CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Baseline | 0 | -9 | 2013-08-14 | SCREENING 1 | 1 | Bilirubin (umol/L) | BILI | 21 | CHEM | 8.55 | 8.55 | NA | 3.0 | 21.0 | 2.850000 | 0.4071429 | 2.850000 | 0.4071429 |  | 22.95 | N | N | Y |  | 6 | NORMAL | 8.55 | ADLBC | NOT HISPANIC OR LATINO | Xanomeline High Dose
CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Baseline | 0 | -9 | 2013-08-14 | SCREENING 1 | 1 | Alkaline Phosphatase (U/L) | ALP | 22 | CHEM | 88.00 | 88.00 | NA | 31.0 | 110.0 | 2.838710 | 0.8000000 | 2.838710 | 0.8000000 |  | 77.00 | N | N | Y |  | 2 | NORMAL | 88.00 | ADLBC | NOT HISPANIC OR LATINO | Xanomeline High Dose
CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Baseline | 0 | -9 | 2013-08-14 | SCREENING 1 | 1 | Gamma Glutamyl Transferase (U/L) | GGT | 23 | CHEM | 43.00 | 43.00 | NA | 10.0 | 61.0 | 4.300000 | 0.7049180 | 4.300000 | 0.7049180 |  | 48.50 | N | N | Y |  | 15 | NORMAL | 43.00 | ADLBC | NOT HISPANIC OR LATINO | Xanomeline High Dose

# 3 Filter data

The `filterData` enables to filter a dataset.

    dataLBAnnotTreatment <- filterData(
        data = dataLBAnnot,
        filters = list(var = "ARM", value = "Placebo", rev = TRUE),
        verbose = TRUE
    )

    ## 354 records with ARM ('ARM') %in% 'Placebo' are filtered in the data.

    knitr::kable(
        unique(dataLBAnnotTreatment[, c("USUBJID", "ARM")]),
        caption = paste("Subset of laboratory parameters filtered",
            "with placebo patients"
        )
    )

Subset of laboratory parameters filtered with placebo patients
| USUBJID | ARM
--- | --- | ---
1 | 01-701-1148 | Xanomeline High Dose
397 | 01-701-1192 | Xanomeline Low Dose
793 | 01-701-1211 | Xanomeline Low Dose
1363 | 01-718-1371 | Xanomeline High Dose
1615 | 01-718-1427 | Xanomeline High Dose

# 4 Transform data

The `transformData` enables to convert data to a different format.

For example, the laboratory data is converted from a long format, containing one record per endpoint * visit * subject to a wide format containing one record per visit * subject. The endpoints are included in different columns.

    eDishData <- transformData(
        data = subset(dataLB, PARAMCD %in% c("ALT", "BILI")),
        transformations = list(
            type = "pivot_wider",
            varsID = c("USUBJID", "VISIT"),
            varsValue = c("LBSTRESN", "LBNRIND"),
            varPivot = "PARAMCD"
        ),
        verbose = TRUE,
        labelVars = labelVars
    )

    ## Warning in reshapeWide(data, idvar = idvar, timevar = timevar, varying =
    ## varying, : some constant variables
    ## (AVISIT,AVISITN,PARAM,PARAMN,AVAL,BASE,CHG,A1LO,A1HI,R2A1LO,R2A1HI,BR2A1LO,BR2A1HI,ANL01FL,ALBTRVAL,LBSEQ)
    ## are really varying

    ## Warning in reshapeWide(data, idvar = idvar, timevar = timevar, varying =
    ## varying, : multiple rows match for PARAMCD=BILI: first taken

    ## Warning in reshapeWide(data, idvar = idvar, timevar = timevar, varying =
    ## varying, : multiple rows match for PARAMCD=ALT: first taken

    ## Data is converted to a wide format with variables: 'LBSTRESN', 'LBNRIND' for different: 'PARAMCD' by 'Unique Subject Identifier', 'Visit Name' pivoted to different columns.

    knitr::kable(head(eDishData))

| STUDYID | SUBJID | USUBJID | TRTP | TRTPN | TRTA | TRTAN | TRTSDT | TRTEDT | AGE | AGEGR1 | AGEGR1N | RACE | RACEN | SEX | COMP24FL | DSRAEFL | SAFFL | AVISIT | AVISITN | ADY | ADT | VISIT | VISITNUM | PARAM | PARAMN | PARCAT1 | AVAL | BASE | CHG | A1LO | A1HI | R2A1LO | R2A1HI | BR2A1LO | BR2A1HI | ANL01FL | ALBTRVAL | ANRIND | BNRIND | ABLFL | AENTMTFL | LBSEQ | DATASET | LBSTRESN.BILI | LBNRIND.BILI | LBSTRESN.ALT | LBNRIND.ALT
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
4 | CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Baseline | 0 | -9 | 2013-08-14 | SCREENING 1 | 1 | Bilirubin (umol/L) | 21 | CHEM | 8.55 | 8.55 | NA | 3 | 21 | 2.85 | 0.4071429 | 2.85 | 0.4071429 |  | 22.95 | N | N | Y |  | 6 | ADLBC | 8.55 | NORMAL | 34 | NORMAL
40 | CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Week 2 | 2 | 14 | 2013-09-05 | WEEK 2 | 4 | Bilirubin (umol/L) | 21 | CHEM | 8.55 | 8.55 | 0.00 | 3 | 21 | 2.85 | 0.4071429 | 2.85 | 0.4071429 |  | 22.95 | N | N |  |  | 43 | ADLBC | 8.55 | NORMAL | 41 | NORMAL
76 | CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Week 4 | 4 | 28 | 2013-09-19 | WEEK 4 | 5 | Bilirubin (umol/L) | 21 | CHEM | 8.55 | 8.55 | 0.00 | 3 | 21 | 2.85 | 0.4071429 | 2.85 | 0.4071429 |  | 22.95 | N | N |  |  | 78 | ADLBC | 8.55 | NORMAL | 35 | NORMAL
112 | CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Week 6 | 6 | 42 | 2013-10-03 | WEEK 6 | 7 | Bilirubin (umol/L) | 21 | CHEM | 8.55 | 8.55 | 0.00 | 3 | 21 | 2.85 | 0.4071429 | 2.85 | 0.4071429 |  | 22.95 | N | N |  |  | 108 | ADLBC | 8.55 | NORMAL | 31 | NORMAL
148 | CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Week 8 | 8 | 57 | 2013-10-18 | WEEK 8 | 8 | Bilirubin (umol/L) | 21 | CHEM | 8.55 | 8.55 | 0.00 | 3 | 21 | 2.85 | 0.4071429 | 2.85 | 0.4071429 |  | 22.95 | N | N |  |  | 138 | ADLBC | 8.55 | NORMAL | 31 | NORMAL
184 | CDISCPILOT01 | 1148 | 01-701-1148 | Xanomeline High Dose | 81 | Xanomeline High Dose | 81 | 2013-08-23 | 2014-02-20 | 57 | <65 | 1 | WHITE | 1 | M | Y |  | Y | Week 12 | 12 | 87 | 2013-11-17 | WEEK 12 | 9 | Bilirubin (umol/L) | 21 | CHEM | 6.84 | 8.55 | -1.71 | 3 | 21 | 2.28 | 0.3257143 | 2.85 | 0.4071429 | Y | 24.66 | N | N |  |  | 168 | ADLBC | 6.84 | NORMAL | 39 | NORMAL

# 5 Process data

The `processData` function executes all the pre-processing steps described in the previous section at once.

    dataLBAnnotTreatment2 <- processData(
        data = dataLB,
        processing = list(
            list(annotate = list(data = dataDM, vars = c("ETHNIC", "ARM"))),
            list(filter = list(var = "ARM", value = "Placebo", rev = TRUE))
        ),
        verbose = TRUE
    )

    identical(dataLBAnnotTreatment, dataLBAnnotTreatment2)

[1] TRUE

# 6 Appendix

## 6.1 Session info

R version 4.5.0 RC (2025-04-04 r88126) Platform: x86_64-pc-linux-gnu Running under: Ubuntu 24.04.1 LTS

Matrix products: default BLAS: /home/lcougnaud/Documents/R/R-4.5.0/lib/libRblas.so LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.12.0 LAPACK version 3.12.0

locale: [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=C
[5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=en_US.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

time zone: Europe/Brussels tzcode source: system (glibc)

attached base packages: [1] stats graphics grDevices utils datasets methods base

other attached packages: [1] clinUtils_0.2.0 clinDataReview_1.6.2 knitr_1.50

loaded via a namespace (and not attached): [1] plotly_4.10.4 sass_0.4.9 generics_0.1.3 tidyr_1.3.1
[5] xml2_1.3.8 stringi_1.8.7 jsonvalidate_1.5.0 hms_1.1.3
[9] digest_0.6.37 magrittr_2.0.3 evaluate_1.0.3 grid_4.5.0
[13] bookdown_0.42 fastmap_1.2.0 plyr_1.8.9 jsonlite_2.0.0
[17] httr_1.4.7 purrr_1.0.4 crosstalk_1.2.1 viridisLite_0.4.2 [21] scales_1.3.0 lazyeval_0.2.2 jquerylib_0.1.4 cli_3.6.4
[25] rlang_1.1.6 munsell_0.5.1 base64enc_0.1-3 cachem_1.1.0
[29] yaml_2.3.10 tools_4.5.0 parallel_4.5.0 dplyr_1.1.4
[33] colorspace_2.1-1 ggplot2_3.5.2 DT_0.33 forcats_1.0.0
[37] vctrs_0.6.5 R6_2.6.1 lifecycle_1.0.4 stringr_1.5.1
[41] htmlwidgets_1.6.4 pkgconfig_2.0.3 pillar_1.10.2 bslib_0.9.0
[45] gtable_0.3.6 data.table_1.17.0 glue_1.8.0 Rcpp_1.0.14
[49] haven_2.5.4 xfun_0.52 tibble_3.2.1 tidyselect_1.2.1
[53] htmltools_0.5.8.1 rmarkdown_2.29 compiler_4.5.0