Check that DBP is not higher than SBP in VS

This check looks for non-missing diastolic BP is not higher than non-missing systolic BP

check_vs_sbp_lt_dbp(VS)

Arguments

VS

Vital Signs SDTM dataset with variables USUBJID,VISIT,VSDTC,VSTESTCD,VSSTRESN,VSSPID

Value

boolean value if check failed or passed with 'msg' attribute if the test failed

Examples

vs <- data.frame(
 STUDYID = 1,
 USUBJID = 1,
 VSSPID = c("1","2","1","2"),
 VISIT = 1,
 VSDTC = c("2010-01-01","2010-01-01","2010-01-01","2010-01-01"),
 VSTESTCD = c("SYSBP","SYSBP",
            "DIABP","DIABP")
            ,
 VSSTRESN = c(80,120,100,80)
 )

 vs0 <- subset(vs, select = c(USUBJID, VSSPID, VSSTRESN))

 check_vs_sbp_lt_dbp(VS=vs)
#> [1] FALSE
#> attr(,"msg")
#> [1] "VS has 1 records with Systolic BP < Diastolic BP. "
#> attr(,"data")
#>   USUBJID VISIT      VSDTC SYSBP DIABP
#> 1       1     1 2010-01-01    80   100
 check_vs_sbp_lt_dbp(VS=vs0)
#> [1] FALSE
#> attr(,"msg")
#> [1] "VS is missing the variables: VISIT, VSDTC, VSTESTCD"