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Trial registered on ANZCTR
Registration number
ACTRN12616001130459
Ethics application status
Approved
Date submitted
14/07/2016
Date registered
19/08/2016
Date last updated
19/08/2016
Type of registration
Retrospectively registered
Titles & IDs
Public title
Monitoring exposure of Western Victorian farmers to organophosphate pesticides
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Scientific title
In-field Personalised Cholinesterase Assessment Project (In-field PCAP): Monitoring Victorian farmers exposed to agricultural pesticides in workplace
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Secondary ID [1]
289502
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Nil
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Universal Trial Number (UTN)
U1111-1184-4753
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Trial acronym
In-field PCAP
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Organophosphate exposure
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Insulin resistance (Fasting blood sugar)
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Condition category
Condition code
Public Health
299210
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0
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Health service research
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Injuries and Accidents
299211
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0
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Poisoning
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Intervention/exposure
Study type
Observational
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Patient registry
False
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Target follow-up duration
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Target follow-up type
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Description of intervention(s) / exposure
Target Population: Western Victorian farmers and agricultural workers engaged in crop and livestock operations, with self-reported use of agrichemicals and cholinesterase inhibiting insecticides.
By measuring the activity of the enzyme cholinesterase, exposure to organophophates can be identified. Enzyme activity will be monitored every 4 weeks over the 12 months period.
Each participant will receive a baseline health check during the first visit including:
a) Measurements: Height, weight, waist and hip circumference, body fat percentage, blood pressure, pulse rate.
b) Capillary blood sample : Collected using a finger prick, will test for : Fasting blood glucose, establish personal quantitative estimates of both red blood cell ChE and Plasma ChE.
c) Health and Chemical usage survey: Complete chemical use and well being questionnaire
For the subsequent visits, each participant will undergo:
a) Capillary blood sample: Individualised cholinesterase activity level measured , recorded and discussed by registered nurse.
b) Health and Chemical usage survey: Chemical use and well being questionnaire
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Intervention code [1]
295093
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Not applicable
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Comparator / control treatment
No control group, due to the personalized nature of cholinesterase monitoring over a period of time
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Control group
Uncontrolled
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Outcomes
Primary outcome [1]
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Difference in average cholinesterase activity using a capillary blood sample
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Assessment method [1]
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Timepoint [1]
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Assessed at baseline, then monthly for a period of 12 months
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Primary outcome [2]
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Link between cholinesterase activity (assessed using a capillary blood sample) and organophosphate use (self reported)
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Assessment method [2]
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Timepoint [2]
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Cholinesterase activity will be assessed at baseline, then monthly for a period of 12 months; data on organophosphate use within the last month at each assessment will be collected
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Secondary outcome [1]
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Stress level assessed using Kessler K10 questionnaire
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Assessment method [1]
325681
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Timepoint [1]
325681
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Baseline
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Secondary outcome [2]
325682
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Mean fasting blood glucose assessed by capillary blood sample
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Assessment method [2]
325682
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Timepoint [2]
325682
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Baseline
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Secondary outcome [3]
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Mean fasting cholesterol levels assessed by capillary blood sample
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Assessment method [3]
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Timepoint [3]
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Baseline
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Eligibility
Key inclusion criteria
Farmers and farm workers, who are routinely working with agrichemicals , particularly those containing organophosphate (AChE inhibiting chemicals), Have not had a previous chemical known incident, are not suffering from a known chronic disorder, not taking anti-inflammatory drugs or supplements. Participants will need to report usage/exposure to OP throughout the course of the study. Competent to decide and have capacity to consent to participate in the study and, attend a health assessment. Live in south west Victoria.
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Minimum age
18
Years
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Maximum age
75
Years
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
Participants of under 18 years of age and who have a recent known chemical incident, or are suffering from a known chronic disease or are taking anti-inflammatory drugs or supplements
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Study design
Purpose
Screening
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Duration
Longitudinal
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Selection
Defined population
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Timing
Both
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Statistical methods / analysis
To evaluate if a difference in cholinesterase activity was present in farmers before and after exposure, sample size is determined at the power of 80% (Beta=0.2) with a set at 0.05 for an effect size of one standard deviation. This requires the sample size to be a minimum of 30 farming individuals exposed to pesticides. By considering the probable retention rate (=85%) for a 12-month study, based on previous research in similar populations, the target recruitment number is fixed at a target of minimum of 50 farmers.
All data will be managed and analysed with SPSS, which is a statistical package widely used in quantitative social science research and is suitable for multivariate analyses. Data will be analysed using repeated measures (subjects as own controls) within the General Linear Model. Correlation coefficients between pesticide exposure and metabolic variables will be calculated using Pearson's and Spearman's correlation as appropriate. p values will be considered statistically significant at the level of <0.05.
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
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Actual
4/04/2016
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
50
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
VIC
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Recruitment hospital [1]
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Western District Health Service - Hamilton - Hamilton
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Recruitment hospital [2]
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Western District Health Service - Coleraine - Coleraine
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Recruitment hospital [3]
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Western District Health Service - Penshurst - Penshurst
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Recruitment postcode(s) [1]
13601
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3300 - Hamilton
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Recruitment postcode(s) [2]
13894
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3315 - Coleraine
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Recruitment postcode(s) [3]
13895
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3289 - Penshurst
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Recruitment postcode(s) [4]
13896
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3483 - Birchip
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Funding & Sponsors
Funding source category [1]
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Charities/Societies/Foundations
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Name [1]
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Shepherd Foundation
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Address [1]
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Suite 33, Cabrini Medical Centre
Malvern Victoria 3144
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Country [1]
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Australia
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Primary sponsor type
University
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Name
Deakin University
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Address
School of Medicine
75 Pigdons Rd, Waurn Ponds VIC 3216
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Country
Australia
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Secondary sponsor category [1]
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Hospital
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Name [1]
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Western District Health Service
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Address [1]
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20 Foster St, Hamilton, VIC, 3300
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Country [1]
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Australia
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
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Deakin University Human Research Ethics Committee
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Ethics committee address [1]
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Deakin University, 221 Burwood Highway, Burwood, VIC 3125
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Ethics committee country [1]
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Australia
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Date submitted for ethics approval [1]
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24/04/2013
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Approval date [1]
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18/06/2013
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Ethics approval number [1]
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2013-100
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Summary
Brief summary
Aims:
This study aims to develop the methodology for clinical point of care (POC) sampling to determine the level of exposure to organophosphates (OP’s) by western Victorian farmers.
Significance:
This methodology will test for cholinesterase activity and provide the basis for future research work by identifying the potential chemical exposure pathways of individuals most at risk in farming communities.
Expected outcomes:
The study will provide a methodology for cholinesterase activity measurement in farmers and the possible integration of POC sampling in farmer health checks. Importantly it will highlight pesticide contact as a risk for farmers, leading to further research to quantify pesticide exposure both on the farm and in the home of farming families.
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Trial website
www.farmerhealth.org.au
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Dr Jacqueline Cotton
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Address
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National Centre for Farmer Health
PO Box 283
Hamilton, VIC 3300
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Country
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Australia
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Phone
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+61 3 555 18585
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Fax
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Email
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[email protected]
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Contact person for public queries
Name
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Dr Jacqueline Cotton
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Address
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National Centre for Farmer Health
PO Box 283
Hamilton, VIC 3300
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Country
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Australia
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Phone
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+61 3 555 18585
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Fax
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Email
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[email protected]
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Contact person for scientific queries
Name
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Dr Jacqueline Cotton
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Address
66800
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National Centre for Farmer Health
PO Box 283
Hamilton, VIC 3300
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Country
66800
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Australia
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Phone
66800
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+61 3 555 18585
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Fax
66800
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Email
66800
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[email protected]
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No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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