12 doctors weighed in:

How common are false positives with cystic fibrosis tests?

12 doctors weighed in
Dr. William Walsh
Addiction Medicine
6 doctors agree

In brief: Rare

Genetic testing has a very low false positive rate, sweat cloride i less precise.

In brief: Rare

Genetic testing has a very low false positive rate, sweat cloride i less precise.
Dr. William Walsh
Dr. William Walsh
Thank
Dr. Richard Roberts
Clinical Genetics
3 doctors agree

In brief: DNA vs. sweat tests

For sweat tests, do not trust a laboratory which is not accredited by the Cystic Fibrosis Foundation.
"Sweat tests should be done at a Cystic Fibrosis Foundation-accredited care center". See http://www.cff.org/AboutCF/Testing/

In brief: DNA vs. sweat tests

For sweat tests, do not trust a laboratory which is not accredited by the Cystic Fibrosis Foundation.
"Sweat tests should be done at a Cystic Fibrosis Foundation-accredited care center". See http://www.cff.org/AboutCF/Testing/
Dr. Richard Roberts
Dr. Richard Roberts
Thank
Dr. Robert Fink
Pediatrics

In brief: Uncommon

False positive sweat tests to diagnose CF are very uncommon.
Genetic testing should never have false positive results. However, newborn screening for CF is frequently positive in babies who have one copy of the CF gene (cf carriers). A positive newborn screening for CF is not a diagnosis of CF unless the baby has a positive sweat test or positive genetic testing with two mutations identified.

In brief: Uncommon

False positive sweat tests to diagnose CF are very uncommon.
Genetic testing should never have false positive results. However, newborn screening for CF is frequently positive in babies who have one copy of the CF gene (cf carriers). A positive newborn screening for CF is not a diagnosis of CF unless the baby has a positive sweat test or positive genetic testing with two mutations identified.
Dr. Robert Fink
Dr. Robert Fink
Thank
Get help from a real doctor now
Dr. Jonathan Jassey
Board Certified, Pediatrics
13 years in practice
1M people helped
Continue
108,000 doctors available
Read more answers from doctors