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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 2-3, 8-129:

Show the other analytes

used

measured in testing

(pH, water activity, NNK, NNN, TSNA, etc.) using the PTTEST and PTTESTCD variables

.

PRODMST
Dataset2
RowSTUDYIDDOMAINSPTOBIDSTOCONIDPTSEQ
PTREFID
PTTESTCDPTTESTPTTSTDTLPTCATPTORRESPTORRESUPTLLODPTSTRESCPTSTRESNPTSTRESU
PTSPEC
PTXFN
PTSPCCND
PTNAM
PTMETHOD
PTSPECPTLLOQPTREPNUMPTDTCPTTPTPTTPTNUM
1TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
1
TOB77777.1
MOISTCTT
Product
Moisture Content
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
STABILITY
STUDY
TESTING8.06

8.068.06
TL009_V1TPT LABCOTOBACCO
102-01-2023Week 01
3TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
3
TOB77777.1
H2OACTWater 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)
Nicotine-Derived Nitrosamine Ketone
STABILITY TESTING
STABILITY STUDY
1.0225ug/g0.011.02251.0225ug/gTL026_V12.2TPT LABCOTOBACCO
, FRESHas-is
0.05102-01-2023
1
Week 01
5TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
5
TOB77777.1
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
TOBACCO, DRIEDdry weight
TL026_V12.2TPT LABCOTOBACCO0.05102-01-2023Week 01
6TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
6
TOB77777.1
NNNN-
nitrosonornicotine
Nitrosonornicotine
STABILITY
STUDY
TESTING4.4633ug/g0.014.46334.4633ug/gTL026_V12.2TPT LABCOTOBACCO
, FRESH
0.05
as-is
102-01-2023Week 01
7TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)
7
TOB77777.1
NNNN-
nitrosonornicotine
NitrosonornicotineDRY WEIGHT BASISSTABILITY
STUDY8TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)8TOB77777.1TSNATobacco-specific nitrosaminesSTABILITY STUDY7.598ug/g7.5987.598ug/gTOBACCO, FRESHas-is1Week 019TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)9TOB77777.1TSNATobacco-specific nitrosaminesSTABILITY STUDY3.7453ug/g3.74533.7453ug/gTOBACCO, DRIEDdry weight1
TESTING2.1424ug/g0.012.14242.1424ug/g
TOBACCO, DRIEDdry weight1Week 01
TL026_V12.2TPT LABCOTOBACCO0.05102-01-2023
Week 01
10
8TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)10TOB77777.1AEBPLCT
8AEBCTAerobic Colony
Aerobic Plate
Count
STABILITY
STUDY
TESTING154000CFU/g1154000154000CFU/gTLMB_V1.1TPT LABCOTOBACCO1102-01-2023Week 01
11
9TOB07PTSmokeless01Condition 1
(X°C/ Z% RH)11TOB77777.1MOLDMold
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)12TOB77777.1YEASTYeastSTABILITY 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
RowSTUDYIDDOMAINSPTOBIDSTOCONIDPTSEQPTREFIDPTTESTCDPTTESTPTORRESPTORRESUPTLLODPTSTRESCPTSTRESNPTSTRESUPTXFNPTNAMPTSPECPTSPCCNDPTMETHODPTLLOQPTREPNUMPTDTCPTTPTPTTPTNUM
1TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)111TOB77777.1PRODMSTMOISTCTTMoisture ContentProduct Moisture51.93%0.151.9351.93%TLT07_V1TPT LABCOTOBACCOADD theseAS-IS0.12102-01-2023Week 01
2TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)112TOB77777.1PRODMSTMOISTCTTMoisture ContentProduct Moisture51.96%0.151.9651.96%TLT07_V1TPT LABCOTOBACCOAS-IS0.12202-01-2023Week 01
3TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)113TOB77777.1PRODMSTMOISTCTTProduct Moisture Content51.98%0.151.9851.98%TLT07_V1TPT LABCOTOBACCOAS-IS0.12302-01-2023Week 01
4TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)114TOB77777.1PRODMSTMOISTCTTProduct Moisture Content51.75%0.151.7551.75%TLT07_V1TPT LABCOTOBACCOAS-IS0.12103-29-2023Week 842
5TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)115TOB77777.1PRODMSTMOISTCTTMoisture ContentProduct Moisture51.75%0.151.7551.75%TLT07_V1TPT LABCOTOBACCOAS-IS0.12203-29-2023Week 842
6TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)116TOB77777.1PRODMSTMOISTCTTMoisture ContentProduct Moisture51.67%0.151.6751.67%TLT07_V1TPT LABCOTOBACCOAS-IS0.12303-29-2023Week 842
7TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)117TOB77777.1PRODMSTMOISTCTTProduct Moisture Content52.05%0.152.0552.05%TLT07_V1TPT LABCOTOBACCOAS-IS0.121Week 4807-19-2023Week 2439
8TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)118TOB77777.1PRODMSTMOISTCTTMoisture ContentProduct Moisture52.68%0.152.6852.68%TLT07_V1TPT LABCOTOBACCOAS-IS0.12207-19-2023Week 482493
9TOB07PTSmokeless01Condition 1 (X°C/ Z% RH)119TOB77777.1PRODMSTMOISTCTTProduct Moisture Content52.21%0.152.2152.21%TLT07_V1TPT LABCOTOBACCOAS-IS0.12307-19-2023Week 482493
10TOB07PTSmokeless01Condition 2 (A °C/ B %RH)120TOB77777.1PRODMSTMOISTCTTProduct Moisture Content51.93%0.151.9351.93%TLT07_V1TPT LABCOTOBACCOAS-IS0.12102-01-2023Week 01
11TOB07PTSmokeless01Condition 2 (A °C/ B %RH)121TOB77777.1PRODMSTMOISTCTTProduct Moisture Content51.96%0.151.9651.96%TLT07_V1TPT LABCOTOBACCOAS-IS0.12202-01-2023Week 01
12TOB07PTSmokeless01Condition 2 (A °C/ B %RH)122TOB77777.1PRODMSTMOISTCTTProduct Moisture Content51.98%0.151.9851.98%TLT07_V1TPT LABCOTOBACCOAS-IS0.12302-01-2023Week 01
13TOB07PTSmokeless01Condition 2 (A °C/ B %RH)123TOB77777.1PRODMSTMOISTCTTMoisture ContentProduct Moisture51.80%0.151.8051.80%TLT07_V1TPT LABCOTOBACCOAS-IS0.12103-29-2023Week 842
14TOB07PTSmokeless01Condition 2 (A °C/ B %RH)124TOB77777.1PRODMSTMOISTCTTProduct Moisture Content51.77%0.151.7751.77%TLT07_V1TPT LABCOTOBACCOAS-IS0.12203-29-2023Week 842
15TOB07PTSmokeless01Condition 2 (A °C/ B %RH)125TOB77777.1PRODMSTMOISTCTTProduct Moisture Content51.84%0.151.8451.84%TLT07_V1TPT LABCOTOBACCOAS-IS0.12303-29-2023Week 842
16TOB07PTSmokeless01Condition 2 (A °C/ B %RH)126TOB77777.1PRODMSTMOISTCTTMoisture ContentProduct Moisture52.18%0.152.1852.18%TLT07_V1TPT LABCOTOBACCOAS-IS0.12107-19-2023Week 482493
17TOB07PTSmokeless01Condition 2 (A °C/ B %RH)127TOB77777.1PRODMSTMOISTCTTMoisture ContentProduct Moisture52.21%0.152.2152.21%TLT07_V1TPT LABCOTOBACCOAS-IS0.12207-19-2023Week 482493
18TOB07PTSmokeless01Condition 2 (A °C/ B %RH)128TOB77777.1PRODMSTMOISTCTTProduct Moisture Content51.87%0.151.8751.87%TLT07_V1TPT LABCOTOBACCO3Week 489

From previous page: - update for this example.... values are likely different - ??? - Condition 1 and Condition 2

The Test Conditions (TC) dataset allows for listing the attributes of the testing regimens used in tobacco product testing when the details are too long and variable for representing as a single value in the PTTSTCND variable in a PT dataset. 

AS-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.The example below shows the attributes of the testing regimen identified as PTTSTCND="E-Liquid Standard Aerosol Condition" (see e-liquid stability study pt.xpt example). Note that the combination of TCVAR1="PTTSTCND" and TCVRVAL1="E-Liquid Standard (Long Term) Condition" identifies the specific testing regimen shown in PTTSTCND as the focus of the testing regimen parameters listed in TCPARMCD/TCPARM. TCVAL and TCVALU show the specific values and units (respectively, where applicable) for the given parameter.one testing regimen shown in the PT stability study above. 
(We've added TCVALU which was not originally part of the TC draft domain. May propose elevating this structure to a "Trial Lookup" observational class, within which some domains would allow for TCVALU) 

SQUARE
Dataset wrap
Nametces
Dataset2
RowSTUDYIDDOMAIN
RDOMAIN
STOCONID
TCVAR1
ESSEQ
TCVRVAL1
ESPARMCD
TCSEQ
ESPARM
TCGRPID
ESVAL
TCPARMCDTCPARMTCVALTCVALU
ESVALU
1

TOB07

TCPTPTTSTCNDSmokeless Standard (Long Term) Condition1PUFFPROFPuff Profile
ESCondition 11HUMIDHumidity37%
2

TOB07

TCPTPTTSTCND
ESCondition 1
Smokeless Standard (Long Term) Condition
2
PUFFDUR
TEMP
Puff Duration

1.25

sec
Temperature24C
3

TOB07

TCPTPTTSTCNDSmokeless Standard (Long Term) Condition3

PUFFINT

Puff Interval

3

PUFF/min
ESCondition 21HUMIDHumidity85%
4

TOB07

TCPTPTTSTCNDSmokeless Standard (Long Term) Condition4

PUFFBLCK

Puff Block

25

%

5

TOB07

TCPTPTTSTCNDSmokeless Standard (Long Term) Condition5NUMPUFFTotal Number of Puffs

200

PUFF

ESCondition 22TEMPTemperature27C
6

TOB07

TCPTPTTSTCNDSmokeless Standard (Long Term) Condition6PUFFVOLPuff Volume

10

mL

7

TOB07

TCPTPTTSTCNDSmokeless Standard (Long Term) Condition7PUFFRNGPuff Range

100-200

8

TOB07

TCPTPTTSTCNDSmokeless Standard (Long Term) Condition81PUFFPAUSPuff Pause

60

s

9TOB07TCPTPTTSTCNDSmokeless Standard (Long Term) Condition91PUFFPINTPuff Pause Interval

10

PUFF