Ignite Creation Date:
2024-05-06 @ 2:50 PM
Last Modification Date:
2024-10-26 @ 1:38 PM
Study NCT ID:
NCT04447495
Status:
COMPLETED
Last Update Posted:
2021-12-23
First Post:
2020-06-23
Brief Title:
Self-sampling for the Study of COVID-19
Sponsor:
Medical College of Wisconsin
Organization:
Medical College of Wisconsin
Study Overview
Official Title:
Self-sampling for the Study of COVID-19
Status:
COMPLETED
Status Verified Date:
2021-12
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
This study will evaluate the feasibility of self-sampling with the iAMP COVID-19 Detection Kit Atila BioSystems Mountain View CA a new low-cost SARS-CoV-2 test that does not require RNA extraction The investigators will compare the sensitivity and specificity of the iAMP assay on self-sampled mid-turbinate anterior nares and saliva swabs against the gold standard a nucleic acid amplification testing assay on a clinician-collected nasopharyngeal swab
Detailed Description:
311 Study population The investigators will enroll patients within a larger clinical validation study of the iAMP test against the gold standard the CDC-recommended test until we have prospectively collected a total of 100 positive cases Current positivity in the region is approximately 20 therefore approximately 500 samples will be needed Inclusion criteria are as follows Patients older than 18 presenting for COVID-19 testing able to tolerate nasopharyngeal swabs and able to follow instructions for self-collection Exclusion criteria are as follows unable or unwilling to provide informed consent andor reliable contact information
312 Clinical visit Symptomatic patients will be approached by a study provider wearing PPE The study will be explained and if the patient agrees they will be consented Patients will be allowed to consent for just the two nasopharyngeal swabs or for all five swabs After consent each patient will undergo testing with simultaneous placement of two nasopharyngeal swabs by a clinician for the large-scale clinical validation One will be stored dry in a tube and one will be placed in viral collection medium Patients who consent to the self-sampling study will be taken to a private area for collection of three different samples After receiving written instructions and watching a short instructional video the mid-turbinate sample will be collected by the patient under the supervision of a clinician The clinician will then leave and the patient will self-collect samples from the anterior nares and saliva All samples will be stored dry When the patient returns the samples to the research coordinator they will be asked about any side effects or adverse events from the mid-turbinate sample
313 Laboratory testing A dry swab will be collected from two of the three iAMP self-sample sites - mid-turbinate and anterior nares - and placed into a vial with the proprietary buffer hereafter referred to as Sample Buffer A For saliva a sterile collection cup will be used for the sample collection and Sample Buffer A will be added directly to the sterile collection cup Each of the three samples with the added Sample Buffer A will incubate at room temperature for 15 minutes A proprietary multiplex mixture master mix will be prepared in a test tube and 10 microliters of the sample from the vial mid turbinate and nares or cup saliva will be added to the test tube The test tube will then be placed into the RT-PCR machine and run to completion of the assay The assay will be resulted as either positive negative or invalid test to be repeated and the result compared to the anonymized result of the nasopharyngeal test run with the CDC recommended NAAT assay
Instructions for subjects on how to correctly collect the swabs from each site Cotton swabs should be flocked and tapered
Mid-turbinate
Wash and dry hands thoroughly
Take a sterile cotton swab and hold it by the stem in your dominant hand
Open the empty iAMP collection vial and hold it in the other hand
Tilt your head back so chin is roughly parallel to ground 70º
Insert the cotton swab to the mark on the stem one inch or 2 cm and rotate the cotton swab completely 360º 3 times
Remove the swab and without touching the cotton tip repeat the process on the other side with the same cotton swab
Remove the swab from the nose do not touch the cotton tip and place the swab cotton tip first into the vial
Break off the upper stem of the cotton swab
Replace the cap onto the vial closing it securely
Give the closed vial to the research personnel
Anterior nares
Wash and dry hands thoroughly
Take a sterile cotton swab and hold it by the stem in your dominant hand
Open the empty iAMP collection vial and hold it in the other hand
Insert the cotton swab into one nostril just until the cotton tip is no longer visible 05 inches or 1 cm
Rotate it inside the nose completely 360º 3 times and leave it in place for 10-15 seconds
Remove the swab and without touching the cotton tip repeat the process in the other nostril again inserting the cotton swab only until the cotton tip is no longer visible rotating it 3 times and leaving it in place for 10-15 seconds
Remove the swab do not touch the cotton tip and place the swab cotton tip first into the vial
Break off the upper stem of the cotton swab
Replace the cap onto the vial closing it securely
Give the closed vial to the research personnel
Saliva
Do not eat drink smoke or chew gum within 30 minutes of the collection
Take a sterile urine cup and spit repeatedly into it until there is 2-3 milliliters of liquid excluding bubbles See image below for example of amount of saliva needed
Keep inside of cup sterile by NOT placing anything fingers objects etc into the cup
Once adequate amount of saliva collected place the cap onto the top of the cup and close it securely
Give closed cup to research personnel
314 Statistical justification Assuming 20 of specimens tested with the NAAT assay will be COVID-19 positive a study of 500 consecutive specimens will yield 100 COVID-19 cases detected by the NAAT assay This study will be able to estimate the 95 confidence interval CI for sensitivity and specificity indicated in the table below for true sensitivity and specificity ranging from 50 to 95 The precision improves the farther the sensitivity and specificity differ from 50
Table 1 95 confidence intervals for detecting sensitivity and specificity True Sensitivity Sensitivity 95 CI True Specificity Specificity 95 CI 50 398 - 602 50 450 - 550 70 600 - 788 70 652 - 745 90 824 - 951 90 866 - 928 95 887 - 984 95 923 - 969
315 RisksSafety The only risk of this study is the additional exposure of the laboratory personnel performing the assay All laboratorians involved are trained in handling infectious agents such as COVID-19 All standard precautions will be used for the handling of the specimens including aliquoting samples in a Biosafety hood and the use of Personal Protective Equipment Patient confidentiality will be assured by the anonymizing of patient samples as previously approved by the MCW IRB
316 Analysis Sensitivity and specificity will be estimated for each iAMP test as well as corresponding 95 exact confidence intervals using the NAAT assay as the reference standard
317 Potential Clinical Limitations
1 Alternative anatomic sites will have lower sensitivity than nasopharyngeal swabs It is possible that the self-collected swabs will have significantly lower sensitivity than nasopharyngeal swabs This is unlikely to be the case because viral load with this novel virus is very high
2 Subjects may refuse to have multiple swabs taken Patients may refuse to give 5 samples Since the self-collected sites are unlikely to cause discomfort we expect that most participants will agree to study participation Even if many patients do not agree to participate there are 700 patients per day presenting with symptoms which a large pool of potential participants which will make it feasible to reach our goal The investigators may need to continue enrollment until there are 100 self-collected COVID-19 subjects if some subjects refuse additional tests
32 Specific Aim 2 Evaluate the incidence of adverse events in a self-collected mid-turbinate sample According to the instructions for use IFU mid-turbinate swabs are required to be collected under medical supervision13 which the CDC reinforces There have been multiple studies that have demonstrated that mid-turbinate samples are effective for detection of other respiratory illnesses14-17 Since mid-turbinate collection may have higher sensitivity than anterior nares or saliva testing it is important to demonstrate that it can be safely collected without clinical supervision Although some patients may be able to perform a mid-turbinate collection via a telehealth visit this would be a barrier to wide scale-up Thus the investigators will allow patients to self-collect a mid-turbinate sample with a collection swab The swab will have an indicator line signaling the mean length to reach the mid-turbinate region in adults approximately 1 inch or 2 cms The healthcare provider will then evaluate the patient for any adverse events related to the patient self-collection such as pain andor bleeding If the incidence of adverse events is absent or very low less than 5 and the sensitivity of the mid-turbinate sample is superior to the anterior nares patients could be allowed to sample their own mid-turbinate region without medical supervision The proportion of participants experiencing each type of adverse event will be estimated along with a corresponding 95 exact confidence interval
40 Summary The Covid-19 pandemic has created a global crisis that is affecting all sectors of society To decrease the catastrophic economic and healthcare impacts of this virus the availability of safe inexpensive and reliable testing will be necessary This project aims to study the self-collection of a low-cost rapid test iAMP in three anatomic areas - the mid-turbinate the nares and saliva - that if validated can help make widespread testing a real possibility The secondary aim is to show that all of these areas can be safely self-collected without the need for clinician supervision Decreasing barriers to Covid-19 testing and processing will help to mitigate this crisis and allow for a return to normal activities
312 Clinical visit Symptomatic patients will be approached by a study provider wearing PPE The study will be explained and if the patient agrees they will be consented Patients will be allowed to consent for just the two nasopharyngeal swabs or for all five swabs After consent each patient will undergo testing with simultaneous placement of two nasopharyngeal swabs by a clinician for the large-scale clinical validation One will be stored dry in a tube and one will be placed in viral collection medium Patients who consent to the self-sampling study will be taken to a private area for collection of three different samples After receiving written instructions and watching a short instructional video the mid-turbinate sample will be collected by the patient under the supervision of a clinician The clinician will then leave and the patient will self-collect samples from the anterior nares and saliva All samples will be stored dry When the patient returns the samples to the research coordinator they will be asked about any side effects or adverse events from the mid-turbinate sample
313 Laboratory testing A dry swab will be collected from two of the three iAMP self-sample sites - mid-turbinate and anterior nares - and placed into a vial with the proprietary buffer hereafter referred to as Sample Buffer A For saliva a sterile collection cup will be used for the sample collection and Sample Buffer A will be added directly to the sterile collection cup Each of the three samples with the added Sample Buffer A will incubate at room temperature for 15 minutes A proprietary multiplex mixture master mix will be prepared in a test tube and 10 microliters of the sample from the vial mid turbinate and nares or cup saliva will be added to the test tube The test tube will then be placed into the RT-PCR machine and run to completion of the assay The assay will be resulted as either positive negative or invalid test to be repeated and the result compared to the anonymized result of the nasopharyngeal test run with the CDC recommended NAAT assay
Instructions for subjects on how to correctly collect the swabs from each site Cotton swabs should be flocked and tapered
Mid-turbinate
Wash and dry hands thoroughly
Take a sterile cotton swab and hold it by the stem in your dominant hand
Open the empty iAMP collection vial and hold it in the other hand
Tilt your head back so chin is roughly parallel to ground 70º
Insert the cotton swab to the mark on the stem one inch or 2 cm and rotate the cotton swab completely 360º 3 times
Remove the swab and without touching the cotton tip repeat the process on the other side with the same cotton swab
Remove the swab from the nose do not touch the cotton tip and place the swab cotton tip first into the vial
Break off the upper stem of the cotton swab
Replace the cap onto the vial closing it securely
Give the closed vial to the research personnel
Anterior nares
Wash and dry hands thoroughly
Take a sterile cotton swab and hold it by the stem in your dominant hand
Open the empty iAMP collection vial and hold it in the other hand
Insert the cotton swab into one nostril just until the cotton tip is no longer visible 05 inches or 1 cm
Rotate it inside the nose completely 360º 3 times and leave it in place for 10-15 seconds
Remove the swab and without touching the cotton tip repeat the process in the other nostril again inserting the cotton swab only until the cotton tip is no longer visible rotating it 3 times and leaving it in place for 10-15 seconds
Remove the swab do not touch the cotton tip and place the swab cotton tip first into the vial
Break off the upper stem of the cotton swab
Replace the cap onto the vial closing it securely
Give the closed vial to the research personnel
Saliva
Do not eat drink smoke or chew gum within 30 minutes of the collection
Take a sterile urine cup and spit repeatedly into it until there is 2-3 milliliters of liquid excluding bubbles See image below for example of amount of saliva needed
Keep inside of cup sterile by NOT placing anything fingers objects etc into the cup
Once adequate amount of saliva collected place the cap onto the top of the cup and close it securely
Give closed cup to research personnel
314 Statistical justification Assuming 20 of specimens tested with the NAAT assay will be COVID-19 positive a study of 500 consecutive specimens will yield 100 COVID-19 cases detected by the NAAT assay This study will be able to estimate the 95 confidence interval CI for sensitivity and specificity indicated in the table below for true sensitivity and specificity ranging from 50 to 95 The precision improves the farther the sensitivity and specificity differ from 50
Table 1 95 confidence intervals for detecting sensitivity and specificity True Sensitivity Sensitivity 95 CI True Specificity Specificity 95 CI 50 398 - 602 50 450 - 550 70 600 - 788 70 652 - 745 90 824 - 951 90 866 - 928 95 887 - 984 95 923 - 969
315 RisksSafety The only risk of this study is the additional exposure of the laboratory personnel performing the assay All laboratorians involved are trained in handling infectious agents such as COVID-19 All standard precautions will be used for the handling of the specimens including aliquoting samples in a Biosafety hood and the use of Personal Protective Equipment Patient confidentiality will be assured by the anonymizing of patient samples as previously approved by the MCW IRB
316 Analysis Sensitivity and specificity will be estimated for each iAMP test as well as corresponding 95 exact confidence intervals using the NAAT assay as the reference standard
317 Potential Clinical Limitations
1 Alternative anatomic sites will have lower sensitivity than nasopharyngeal swabs It is possible that the self-collected swabs will have significantly lower sensitivity than nasopharyngeal swabs This is unlikely to be the case because viral load with this novel virus is very high
2 Subjects may refuse to have multiple swabs taken Patients may refuse to give 5 samples Since the self-collected sites are unlikely to cause discomfort we expect that most participants will agree to study participation Even if many patients do not agree to participate there are 700 patients per day presenting with symptoms which a large pool of potential participants which will make it feasible to reach our goal The investigators may need to continue enrollment until there are 100 self-collected COVID-19 subjects if some subjects refuse additional tests
32 Specific Aim 2 Evaluate the incidence of adverse events in a self-collected mid-turbinate sample According to the instructions for use IFU mid-turbinate swabs are required to be collected under medical supervision13 which the CDC reinforces There have been multiple studies that have demonstrated that mid-turbinate samples are effective for detection of other respiratory illnesses14-17 Since mid-turbinate collection may have higher sensitivity than anterior nares or saliva testing it is important to demonstrate that it can be safely collected without clinical supervision Although some patients may be able to perform a mid-turbinate collection via a telehealth visit this would be a barrier to wide scale-up Thus the investigators will allow patients to self-collect a mid-turbinate sample with a collection swab The swab will have an indicator line signaling the mean length to reach the mid-turbinate region in adults approximately 1 inch or 2 cms The healthcare provider will then evaluate the patient for any adverse events related to the patient self-collection such as pain andor bleeding If the incidence of adverse events is absent or very low less than 5 and the sensitivity of the mid-turbinate sample is superior to the anterior nares patients could be allowed to sample their own mid-turbinate region without medical supervision The proportion of participants experiencing each type of adverse event will be estimated along with a corresponding 95 exact confidence interval
40 Summary The Covid-19 pandemic has created a global crisis that is affecting all sectors of society To decrease the catastrophic economic and healthcare impacts of this virus the availability of safe inexpensive and reliable testing will be necessary This project aims to study the self-collection of a low-cost rapid test iAMP in three anatomic areas - the mid-turbinate the nares and saliva - that if validated can help make widespread testing a real possibility The secondary aim is to show that all of these areas can be safely self-collected without the need for clinician supervision Decreasing barriers to Covid-19 testing and processing will help to mitigate this crisis and allow for a return to normal activities
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
False
Is a FDA Regulated Device?:
True
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
False
Is an FDA AA801 Violation?:
None