PFL data collection – hands on session

PFL data collection –
hands on session
Ruth Geraghty
Data Curator
Children’s Research Network
Finding and re-using research data workshop
UCD Health Sciences Library, 15th June 2017
Session 14:00 – 15:30

Overview of this session
• Presentation and Q&A with Ailbhe Booth, member of the PFL
evaluation team at UCD Geary (about 30 mins)
• Guided hands on session with a subset of data from archived PFL
collection using SPSS – chance to see inside an archived collection
(about an hour)

1. Recap of the Preparing for Life collection
Recap of this collection

Preparing for Life collection: Evaluation of the Preparing for Life
early childhood intervention (PFL), 2008 – 2015
Study number (SN): 0055-00
Where can I find out more about this collection?
https://www.ucd.ie/issda/data/pfl/
Where can I find out more about the PEI Research Initiative?
http://www.childrensresearchnetwork.org/knowledge/collection/prevention-and-
early-intervention
Data should always be cited in any new work. Use the following:
Northside Partnership; Orla Doyle; UCD Geary Institute PFL Evaluation Team
(2017). Preparing for Life collection: Evaluation of the Preparing for Life early
childhood intervention, 2008 - 2015. [collection]. Version 1. Dublin: Irish Social
Science Data Archive [distributor ] SN: 0055-00. ucd.ie/issda/pfl

Preparing for Life collection: Evaluation of the Preparing for Life
early childhood intervention (PFL), 2008 – 2015 Study number
(SN): 0055-00
How do I get the full PFL collection?
To access the data, please complete a request form for research
purposes, sign it, and send it to ISSDA by email.
Data will be disseminated on receipt of a fully completed, signed
form. Incomplete or unsigned forms will be returned to the data
requester for completion.

Recap on PFL intervention and evaluation
• Operated by Northside Partnership in Dublin
• Objective: improve levels of school readiness of young children from several disadvantaged
areas in North Dublin
• Intervention: pregnancy to age 4 (school entry)
• UCD Geary Institute (Dr. Orla Doyle)
• 2008 – 2015
• 7 waves of data collection:
• prenatal baseline, 6 months, 12 months, 18 months, 24 months, 36 months, 48 months
• Mixed methods approach
• Impact evaluation, implementation analysis, process evaluation, direct observation of children using
British Ability Scale at school entry
• Randomisation into low support and high support, plus a comparison community (LFP)
What we’ll look at today

Domains examined by PFL
EIGHT DOMAINS
1. Child development
2. Child health
3. Parenting
4. Home environment
5. Maternal health and wellbeing
6. Social support
7. Childcare and service use
8. Household factors and socioeconomic status
What we’ll look at today

2. Starting out
A run through of the basic features of the archived file

Contents of the archived file
Data: The archived dataset (in the case of PFL 1 data file per wave)
Survey: The survey instrument used to gather data (in the case of PFL 1 survey per wave). Copyrighted
scale material may be redacted from the archived version, but where this occurs a citation for the scale
is provided.
Codebooks: The codebook lists all variables in the archived dataset with some basic frequencies (in the
case of PFL a codebook for each wave). This codebook was created during the archiving process. Look
at the index at the end for a quick reference list of all variables in a data file.
Report: The published evaluation report by the researchers that created this dataset (in the case of
PFL 1 report per wave)

Please check that you have the following four
folders
Files for workshop 15 June
BL
12m
24m
48m

Inside each folder check you have these files
(includes contextual materials)
BL folder
PFL_BL_Data-sample
PFL-BL-Codebook
PFL-BL-Report
PFL-BL-Survey
12m folder
PFL_12m_Data-sample
PFL-12m-Codebook
PFL-12m-Report
PFL-12m-Survey
24m folder
PFL_24m_Data-sample
PFL-24m-Codebook
PFL-24m-Report
PFL-24m-Survey
48m folder
PFL_48m_Data-sample
PFL-48m-Codebook
PFL-48m-Report
PFL-48m-Survey

Check you can open each of these in SPSS
1. PFL_BL_Data-sample = pre-natal interview with expectant mother
2. PFL_12m_Data-sample = interview with mother when child was 1 year
old
3. PFL_24m_Data-sample = interview with mother when child was 2 years
old
4. PFL_48m_Data-sample = interview with mother when child was 4 years
old (final interview)
The archival version was processed, including anonymisation of potentially
identifying information

3. Using SPSS
Getting started in SPSS

Opening SPSS
1. IBM SPSS Statistics 24
2. Select ‘Open another
file’ option

Opening SPSS
3. Navigate to the PFL files on your machine
• PFL_BL_Data-sample.sav
• PFL_12m_Data-sample.sav
• Double click each to open in SPSS
• You can keep all 4 PFL files open simultaneously

4. Working with the data files
A little bit of light analysis using SPSS

Please note!
• You are working with a sample of the data file
• Use the codebook to get an indication of the full set of variables in each wave
• But you are only able to see a sub-set today – codebook lists full archival
dataset
• Data should not be copied or saved onto another device, or taken out of this
room
• Codebooks, User Guide, Surveys and Reports are openly available on ISSDA
website
• If you would like to access this data please apply through ISSDA

Variable naming conventions of PEI-RI project
Survey variables: Variables that were generated by the survey correspond to the question number in the
survey, and are labelled to correspond as closely as possible to the original wording of the survey
question. Labels are sometimes composed from truncated survey questions due to character restrictions
in the software (see below).
In 24m data file: scroll down to variables d4, d5, d7, d8, d10 – compare these to the 24m survey
Derived variables: Variables that were created during data entry and analysis
In 24m data file: scroll down to poor_eating (v46) – this was derived from the previous questions ‘How
often does baby eat (v39-45)
Anonymisation variables: Variables that were created during anonymisation
In 24m data file: scroll down to d4 What is your current relationship status (v48) – this was recoded
into broader categories

Variable naming conventions of PEI-RI project
Scale variables: Individual scale items, domain scores and total scores are named with the scale
acronym which is capitalised for ease of reference . These acronyms are consistent across all waves
to facilitate the user to track specific measures across waves. A full list of scale acronym and their
full title and citation are available in Appendix 3. Where permission has been granted to reproduce
the scale contents in the archive, items are labelled so that they correspond as closely as possible to
the wording of the survey question. Where this permission has not been granted, individual item are
labelled with the scale title and sequence number.
In 24m data file: scroll down to CDI_baabaa McArthur-Bates CDI Toddler short – form A (v73 onwards)
to see scale items, and total scores

Conventions of PEI-RI project: Missing cases
are included
Why are there missing cases? All 332 cases are included in the data file for
each wave, so that individual wave files can be merged together if
required. However, data was not collected for every case at each data
collection point and consequently there are a small number of missing
cases per wave. Missing cases in the data file are indicated by the system
missing count and by the variable PFL_control. A count of missing cases
per wave is also provided at the start of the codebook for ease of
reference. Using the 12m file, run a frequency using the variable Trial Group:
PFL intervention or control [PFL_Control]
Method: Analyze / Descriptive Statistics / Frequencies
Result: 82 in LFP, 165 in PFL and 85 not included in wave

Conventions of PEI-RI project: Missing data
Why are there missing data? While participants were encouraged to answer all questions
during the interview, there were some instances where a participant either could not provide
a response to a question or did not wish to provide a response. Missing data are included in
the archived dataset (marked as missing or left blank) so that new users can manage missing
data in a manner that best suits their research design.
Non-response codes for categorical variables:
996 = missing
997 = not applicable
998 = refuse
Missing data for scales: Calculation rules for missing scale items are provided in Appendix of
user guide. Users should refer to the codebook for specific information on the calculation of
cut off points.

Merging wave files
• Same cases included in all waves (even where data not collected)
• Two files can be match using ID variable – make sure they are both
in ascending order (or at last the same order)
• Data / Merge files/ Add variables
• Excluded variables = variables that are common to both files
• New Active Dataset = variables that will be included in new file
• Tick Match cases on key variables and add PFL_ID to the Key Variables box
Try merging the BL and 12m file together

5. Demographic and health variables
A sample of variables from PFL

Household demographic variables
• Age
• Ethnicity
• No of children (first time mother)
• Highest level of education
• Literacy
• Current work status / change to work status
• Social housing
• Medical card, GP card
• Health insurance
• Social welfare payments
• Financial difficulty (self-assess)
• Household income (equivalised – anon)
• Household size (equiv size – anon)
• EU-SILC material deprivation

Maternal health behaviour variables
Baby’s health:
• Baby age, gender, weight,
height
• Health over last 6 months
• Immunisations
• Breastfeeding / child’s eating
• Child’s sleep behaviours
• TV and screen time
Mother’s health:
• Physical activity
• Substance use
• WHO5
• Subjective health assessment

Standardised measures – a small sample for
review
24m file
McArthur Bates – just 10 items
as sample
CBCL – just 10 items as sample
48m file
Child’s sleeping habits (CSH) –
full scale

PFL data collection – hands on session

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