Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.
Warning

This example will need to be updated following the ENDS stability study approach, which was created to reflect recent developments and consultation with CDISC ISMT

Info

The first PT dataset shows 7 constituents/parameters, each as a single replicate (PTREPNUM=1), at 1 time point (PTTPT=Week 0 / PTTPTNUM=1) and from 1 set of storage conditions (STOCONID= Condition 1)

NOTE TO TEAM REVIEWERS:

The example below demonstrates the required data structure of one record per analyte per replicate per test condition per timepoint to accurately represent data from a stability study.
The resulting structure would require 648 rows to illustrate the 12 analytes shown in the example study we received, done in triplicate under two test conditions at the number of timepoints in the example study.

For conciseness, we have abbreviated the examples below to demonstrate the concepts as follows:

First- we show all 12 analytes as a single replicate, at one time point and one test condition in order to illustrate the variables and terminology required to put together a stability study with assays  done in replicate at different time points and varying test conditions, even though only one record per analyte is illustrated.

Second- We show ONE analyte (moisture) in triplicate, over a series of time points and two test conditions to give a sense of what the complete data would look like.

Hopefully users could combine the information shown in both examples to construct a complete dataset containing all the records for each analyte-replicate-test condition-time point group.

Info
titleTobacco domains

DI = TO for Tobacco Product Identifiers and Descriptors

SPDEVID = SPTOBID for Sponsor Tobacco Product Identifier

DO/DU = Tobacco Product Design Parameters (PD)

LB = Tobacco Product Testing (PT) - [Would Findings be better?]

Shelf life study has a protocol and provides the results of shelf life studies of tobacco products over time with different conditions and analytes.  Generally there are many conditions with at least two with varying temperature, humidity, etc.

The initial table shows the a number of the analytes and test conditions used in Shelf Life studies for tobacco products for one testing condition at one timepoint and one replicate.

...

construct an SDTM-conformant PT dataset for a stability study of a smokeless product. Some constituent names (Values of PTTESTCD/PTTEST) appear twice because their results are reported two separate ways: once for the result as tested and once where the result is expressed as dry weight basis (the latter is indicated by PTTSTDTL = DRY WEIGHT BASIS). Note that the constituent/parameter names shown do not represent an exhaustive list of the controlled terminology that will be developed to support representation of stability studies in SDTM.

Note
  • STOCONID is used to identify the storage conditions of the e-liquid product for the testing performed. Details of these conditions are represented in the ES dataset example that follows the 2 PT dataset examples. 
  • PTXFN (External File Path) is used to document the location or file name within the submission that contains the lab methodology protocol used to assay the associated constituent/parameter when such methodology is too complex for the single PTMETHOD variable.
Dataset wrap
Namept
Rowcaps
Row 1:

Shows the PTTEST of

Product

Moisture Content, which reflects the percentage of moisture in the substance for the condition noted in

PTTSTCND which is

STOCONID (i.e., Condition 1

(X°C/ Z% RH

). 

Product

Moisture

is sometimes referred to as "Oven Volatiles"

Content is used in chemistry stability studies. For microbial stability studies, Water Activity should be used, not Moisture Content (see row 3).

Rows 4, 6, 8:Show the NNK , and NNN , and TSN tests with the results from the tobacco product "as-is" using the PTSPCCND to show that the tobacco is "FRESH"as tested.
Rows 5, 7, 9:Show the NNK , NNN, and TSN tests with the tobacco product as "Dry and NNN test results as dry weight basis (DWB)" using the TTSPCCND to show that the tobacco is "DRIED".. Note the use of PTTSTDTL = "DRY WEIGHT BASIS"
Rows 2-123, 8-9:

Show the other analytes

used

measured in testing

(pH, water activity, NNK, NNN, TSNA, etc

.

) using the PTTEST and PTTESTCD variables.

Dataset2
RowSTUDYIDDOMAINSPTOBIDSTOCONIDPTSEQ
PTREFID
PTTESTCDPTTESTPTTSTDTLPTCATPTORRESPTORRESUPTLLODPTSTRESCPTSTRESNPTSTRESU
PTSPCCND
PTXFN
PTMATRIX
PTNAM
PTMETHOD
PTSPECPTLLOQPTREPNUMPTDTCPTTPTPTTPTNUM
1TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)PRODMST
1
TOB77777.1
MOISTCTT
Product
Moisture Content
Product Moisture

STABILITY
STUDY
TESTING52.0%0.152.052.0%

TLT07_V1

TPT LABCOTOBACCO0.12102-01-2023Week 01
2TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
2
TOB77777.1
PHpH
pH

STABILITY
STUDY
TESTING8.06

8.068.06
TL009_V1TPT LABCOTOBACCO
102-01-2023Week 01
3TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
3
TOB77777.1
H2OACT
Water Activity
Water Activity
STABILITY
STUDY
TESTING0.86
0.010.860.86
TLPH01_V1TPT LABCOTOBACCO0.05102-01-2023Week 01
4TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
4
TOB77777.1
NNK
4-(N-methyl-N-nitrosoamino)-1-(3-pyridyl)-1-butanone (NNK)4-(N-methyl-N-nitrosoamino)-1-(3-pyridyl)-1-butanone (NNK)
Nicotine-Derived Nitrosamine Ketone
STABILITY TESTING
STABILITY STUDY
1.0225ug/g0.011.02251.0225ug/g
as-is
TL026_V12.2TPT LABCOTOBACCO0.05
TOBACCO, FRESH
102-01-2023Week 01
5TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
5
TOB77777.1
NNK
4-(N-methyl-N-nitrosoamino)-1-(3-pyridyl)-1-butanone (NNK)4-(N-methyl-N-nitrosoamino)-1-(3-pyridyl)-1-butanone (NNK)
Nicotine-Derived Nitrosamine KetoneDRY WEIGHT BASISSTABILITY TESTING
STABILITY STUDY
0.4908ug/g0.010.49080.4908ug/g
dry weightTOBACCO, DRIED
TL026_V12.2TPT LABCOTOBACCO0.05102-01-2023
1
Week 01
6TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
6
TOB77777.1
NNNN-
nitrosonornicotineN-nitrosonornicotine
Nitrosonornicotine
STABILITY
STUDY
TESTING4.4633ug/g0.014.46334.4633ug/g
as-isTOBACCO, FRESH
TL026_V12.2TPT LABCOTOBACCO0.05102-01-2023
1
Week 01
7TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
7
TOB77777.1
NNNN-
nitrosonornicotine
NitrosonornicotineDRY WEIGHT BASIS
N-nitrosonornicotine
STABILITY
STUDY9TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)9TOB77777.1TSNATobacco-specific nitrosaminesTobacco-specific nitrosaminesSTABILITY STUDY3.7453ug/g3.74533.7453ug/gdry weightTOBACCO, DRIED1
TESTING2.1424ug/g0.012.14242.1424ug/g
dry weightTOBACCO, DRIED1Week 018TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)8TOB77777.1TSNATobacco-specific nitrosaminesTobacco-specific nitrosaminesSTABILITY STUDY7.598ug/g7.5987.598ug/gas-isTOBACCO, FRESH1Week 01
TL026_V12.2TPT LABCOTOBACCO0.05102-01-2023
Week 01
10
8TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)10TOB77777.1AEBPLCTAerobic Plate CountAerobic Plate Count
8AEBCTAerobic Colony Count
STABILITY TESTING
STABILITY STUDY
154000CFU/g1154000154000CFU/gTLMB_V1.1TPT LABCOTOBACCO1102-01-2023Week 01
11
9TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)11TOB77777.1MOLDMoldMold
9YSTMLDCTYeast and/or Mold Colony Count
STABILITY TESTING
STABILITY STUDY
<10CFU/g
<10
1<10
CFU/g
TOBACCO
TLMB_V1.1
Week 0112TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)12TOB77777.1YEASTYeastYeastSTABILITY STUDY<10CFU/g<10<10CFU/gTOBACCO1
TPT LABCOTOBACCO1102-01-2023Week 01

*DWB=Dry weight basis. The DWB normalizes the results since starting moisture may vary.

...

Info

The second PT dataset shows testing for just 1 parameter (Moisture Content), performed in 3 replicates (note the values of PTREPNUM), at the first 3 time points of the study (as shown in PTTPT/PTTPTNUM), from 2 sets of storage conditions (STOCONID), in samples of both dried and as-is tobacco (PTSPEC, PTSPCCND) in order to illustrate how those variables are used to represent their associated concepts in a stability study. 

Note
  • Details of the storage conditions are represented in the ES dataset example that follows.
Dataset wrap
Namept
Rowcaps
Rows 1-9:

Show the

PTTEST

results of

Product Moisture for Condition 1 (X°C/ Z% RH) which is shown in PTTSTCND. The sample of various timepoints that may be used in the testing for product moisture is reflected in PTTPT. The PTTPTNUM shows the numerical version of the planned timepoint.  The REPNUM shows the incidence number of a test that is repeated within a given timeframe for the same test.

testing Moisture Content in 3 replicates (PTREPNUM) at 3 timepoints (weeks 0, 8, and 24) under the storage "Condition 1" (STOCONID). 

Rows 10-18:Show the PTTEST results of Product Moisture for Condition 2 Condition 2 (A °C/ B %RH) across the same timepoints shown for Condition 1.  The PTGRPID is used to tie together a block of related records in a single domain.testing Moisture Content in 3 replicates (PTREPNUM) at 3 timepoints (weeks 0, 8, and 24) under the storage "Condition 2" (STOCONID). 
Dataset2
9
RowSTUDYIDDOMAINSPTOBIDSTOCONIDPTSEQPTREFIDPTTESTCDPTTESTPTTSTCNDPTORRESPTORRESUPTLLODPTSTRESCPTSTRESNPTSTRESUPTXFNPTNAMPTSPECPTSPCCNDPTMETHODPTLLOQPTREPNUMPTDTCPTTPTPTTPTNUM
1TOB07PTSmokeless01Condition 1111MOISTCTTMoisture Content51.93%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO151.9351.93%TLT07_V1TPT LABCOTOBACCOAS-IS0.12102-01-2023Week 01
2TOB07PTSmokeless01Condition 1112MOISTCTTMoisture Content51.96%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO251.9651.96%TLT07_V1TPT LABCOTOBACCOAS-IS0.12202-01-2023Week 01
3TOB07PTSmokeless01Condition 1113MOISTCTTMoisture Content51.98%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO351.9851.98%TLT07_V1TPT LABCOTOBACCOAS-IS0.12302-01-2023Week 01
4TOB07PTSmokeless01Condition 1114MOISTCTTMoisture Content51.75%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO1Week 851.7551.75%TLT07_V1TPT LABCOTOBACCOAS-IS0.12103-29-2023Week 824
5TOB07PTSmokeless01Condition 1115MOISTCTTMoisture Content51.75%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO51.7551.75%TLT07_V1TPT LABCOTOBACCOAS-IS0.12203-29-20232Week 842
6TOB07PTSmokeless01Condition 1116MOISTCTTMoisture Content51.67%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO51.6751.67%TLT07_V1TPT LABCOTOBACCOAS-IS0.12303-29-20233Week 842
7TOB07PTSmokeless01Condition 1117MOISTCTTMoisture Content52.05%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO1Week 4852.0552.05%TLT07_V1TPT LABCOTOBACCOAS-IS0.12107-19-2023Week 2439
8TOB07PTSmokeless01Condition 1118MOISTCTTMoisture Content52.68%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO2Week 4852.6852.68%TLT07_V1TPT LABCOTOBACCOAS-IS0.12207-19-2023Week 2439
9TOB07PTSmokeless01Condition 1119MOISTCTTMoisture Content52.21%0TOB77777.1PRODMSTProduct MoistureCondition 1 (X°C/ Z% RH)%%TOBACCO3Week 4852.2152.21%TLT07_V1TPT LABCOTOBACCOAS-IS0.12307-19-2023Week 2439
10TOB07PTSmokeless01Condition 2120MOISTCTTMoisture Content51.93%0TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO51.9351.93%TLT07_V1TPT LABCOTOBACCOAS-IS0.12102-01-20231Week 01
11TOB07PTSmokeless01Condition 2121MOISTCTTMoisture Content51.96%0TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO251.9651.96%TLT07_V1TPT LABCOTOBACCOAS-IS0.12202-01-2023Week 01
12TOB07PTSmokeless01Condition 2122MOISTCTTMoisture Content51.98%0TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO351.9851.98%TLT07_V1TPT LABCOTOBACCOAS-IS0.12302-01-2023Week 01
13TOB07PTSmokeless01Condition 2123MOISTCTTMoisture Content51.80%0TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO1Week 851.8051.80%TLT07_V1TPT LABCOTOBACCOAS-IS0.12103-29-2023Week 824
14TOB07PTSmokeless01Condition 2124MOISTCTTMoisture Content51.77%0TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO51.7751.77%TLT07_V1TPT LABCOTOBACCOAS-IS0.12203-29-20232Week 842
15TOB07PTSmokeless01Condition 2125MOISTCTTMoisture Content51.84%0TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO3Week 851.8451.84%TLT07_V1TPT LABCOTOBACCOAS-IS0.12303-29-2023Week 824
16TOB07PTSmokeless01Condition 2126MOISTCTTMoisture Content52.18%0TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO1Week 4852.1852.18%TLT07_V1TPT LABCOTOBACCOAS-IS0.12107-19-2023Week 2439
17TOB07PTSmokeless01Condition 2127MOISTCTTMoisture Content52.21%0TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO2Week 4852.2152.21%TLT07_V1TPT LABCOTOBACCOAS-IS0.12207-19-2023Week 2439
18TOB07PTSmokeless01Condition 2128TOB77777.1PRODMSTProduct MoistureCondition 2 (A °C/ B %RH)%%TOBACCO3Week 48MOISTCTTMoisture Content51.87%0.151.8751.87%TLT07_V1TPT LABCOTOBACCOAS-IS0.12307-19-2023Week 243

Details of the storage conditions are represented in the Environmental Storage Conditions (ES) dataset. The variable STOCONID/Storage Condition ID represents the storage condition and links to the PT datasets by matching values of STOCONID there. Each of the parameters defining that storage condition are represented in ESPARMCD/ESPARM, with values and units shown in ESVAL/ESVALU. The ES dataset shows both sets of storage conditions used across both of the PT dataset examples.

Dataset wrap
Namees
Dataset2
RowSTUDYIDDOMAINSTOCONIDESSEQESPARMCDESPARMESVALESVALU
1

TOB07

ESCondition 11HUMIDHumidity37%
2

TOB07

ESCondition 12TEMPTemperature24C
3

TOB07

ESCondition 21HUMIDHumidity85%
4

TOB07

ESCondition 22TEMPTemperature27C