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Calibration of Urine pH Strips for NCI Case-Control Studies on Bladder Cancer and Comparison of DNA Yields From Buccal Cells Collected Through Two Different Methods

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ClinicalTrials.gov Identifier: NCT00339443
Recruitment Status : Completed
First Posted : June 21, 2006
Last Update Posted : July 2, 2017
Sponsor:
Information provided by:

Study Description
Brief Summary:
We propose to conduct a pilot study among 30 volunteers from the Division of Cancer Epidemiology and Genetics (DCEG) in order to: (1) select the urine pH strip that most closely correlates with urine pH measured by pH meter for the New England Bladder Cancer Study, (2) calibrate the urine pH strip that was used for the Spanish Bladder Cancer Study against pH measured by a pH meter, and (3) compare the DNA yields from buccal cells obtained from two different methods: mouthwash vs toothbrush-rinse method. Information collected from this pilot study will be used to select and optimize the sample collection protocols in the New England Bladder Cancer Study. At the time of enrollment, study participants will be asked to provide information on age, gender, height, weight, consumption of antacids and calcium supplements, and whether they ate, drank or brushed their teeth in the last hour previous to the buccal cells ample collection. In addition, they will have to measure their urine pH with four different pH strips twice a day (early morning and before dinner) for a week and record the measurements in a diary. During the same week, they will be asked to collect two spot urine samples each day from Monday to Thursday (early morning and before dinner), and one more on Friday morning, and bring them into work in a cooler. Also, they will be asked to collect a continuous 24-hour urine sample during one of the three first days of the week. Urine samples will e picked up by lab personnel from BioReliance, and pH will be measured at their laboratory with the four pH strips again and with a pH meter. Buccal cells sample collection will be completed during the first and the last day of the urine sample collection period. The first day, study participants will be asked to provide a water rinse sample after brushing the inside of their cheeks with a toothbrush, and a week later they will be asked to provide a mouth wash sample consisting of two consecutive rinses with Scope mouthwash. All samples and questionnaire data will be unlinked from personal identifiers after the sample collection is completed. Participants will be compensated with $100 for the inconvenience of participating in this complex study and for their time.

Condition or disease
Calibration

Detailed Description:
We conducted a pilot study among 30 volunteers from the Division of Cancer Epidemiology and Genetics (DCEG) in order to: (1) select the urine pH strip that most closely correlates with urine pH measured by pH meter for the New England Bladder Cancer Study, (2) calibrate the urine pH strip that was used for the Spanish Bladder Cancer Study against pH measured by a pH meter, and (3) compare the DNA yields from buccal cells obtained from two different methods: mouthwash vs toothbrush-rinse method. At the time of enrollment, study participants were asked to provide information on age, gender, height, weight, consumption of antacids and calcium supplements, and whether they ate, drank or brushed their teeth in the last hour previous to the buccal cells sample collection. In addition, they measured their urine pH with four different pH strips twice a day (early morning and before dinner) for a week and record the measurements in a diary. During the same week, they were asked to collect two spot urine samples each day from Monday to Thursday (early morning and before dinner), and one more on Friday morning, and bring them into work in a cooler. Also, they were asked to collect a continuous 24-hour urine sample during one of the three first days of the week. Urine samples were picked up by lab personnel from BioReliance, and pH was measured at their laboratory with the four pH strips again and with a pH meter. Buccal cells sample collection was completed during the first and the last day of the urine sample collection period. The first day, study participants were asked to provide a water rinse sample after brushing the inside of their cheeks with a toothbrush, and a week later they were asked to provide a mouth wash sample consisting of two consecutive rinses with Scope mouthwash. All samples and questionnaire data was unlinked from personal identifiers after the sample collection was completed. Participants were compensated with $100 for the inconvenience of participating in this complex study and for their time. Information collected from this pilot study has been used to prepare manuscripts, as well as select and optimize the sample collection protocols in the New England Bladder Cancer Study.

Study Design

Study Type : Observational
Estimated Enrollment : 120 participants
Official Title: Calibration of Urine pH Strips for NCI Case-Control Studies on Bladder Cancer and Comparison of DNA Yields From Buccal Cells Collected Through Two Different Methods
Study Start Date : November 6, 2001
Estimated Study Completion Date : May 19, 2010

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Groups and Cohorts


Outcome Measures

Eligibility Criteria

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

Members of the DCEG staff.

Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00339443


Locations
United States, Maryland
National Cancer Institute (NCI), 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Cancer Institute (NCI)
More Information

ClinicalTrials.gov Identifier: NCT00339443     History of Changes
Other Study ID Numbers: 999902040
02-C-N040
First Posted: June 21, 2006    Key Record Dates
Last Update Posted: July 2, 2017
Last Verified: May 19, 2010

Keywords provided by National Institutes of Health Clinical Center (CC):
Buccal Cells
Concordance
DNA Yields
pH Meter
Urine pH
Calibration

Additional relevant MeSH terms:
Urinary Bladder Neoplasms
Urologic Neoplasms
Urogenital Neoplasms
Neoplasms by Site
Neoplasms
Urinary Bladder Diseases
Urologic Diseases