Truckers Drive Their Own Assessment for Obstructive Sleep Apnea: A Collaborative

Approach to Online Self-Assessment for Obstructive Sleep Apnea

Ben Smith, MS, North Carolina State UniversityGary Hull, TFAC/AWAKE

Bob Stanton, TFAC/AWAKEBarbara Phillips, MD, MSPH, FCCP, University of

Kentucky

Disclosures

• Benjamin Smith:– IBM PhD Fellowship– NSF Career Grant No. 0346903

• Gary Hull-None• Bob Stanton-None• Barbara Phillips:

– Department of Transportation, FMCSA– Cephalon– PriMed (funded by ResMed, Philips)– Barnwell, Whaley, LLC

Obstructive Sleep Apnea (OSA) and Commercial Motor Vehicle Drivers (CMVDs) • Approximately 5,600 people are killed every

year in crashes with commercial motor vehicles.

• Between 20 and 30% of crashes with CMVDs are sleep-related (Akerstedt T J Sleep Res 2000)

• At least 25% of CMVDs have OSA (Pack A AJRCCM 2006)

Commercial Drivers Carry Increased Risk for Crash

They may• operate larger vehicles• transport hazardous materials• carry multiple passengers • operate for longer stretches of time • have an economic incentive to continue

driving when private drivers may choose to stop for a medical reason or road conditions.

The Federal Motor Carrier Safety Administration (FMCSA) Regulates CMVD’s

Background/Rationale

Based on an evidence review• The FMCSA Medical Expert Panel recommended that

CMVDs undergo testing for OSA if – they have a positive Berlin Questionnaire and/or– BMI > 33 kg/m2.

• The FMCSA Medical Review Board recommended that CMVDs undergo testing for OSA if – they have a positive Berlin Questionnaire and/or– BMI > 30 kg/m2.

Development of Collaboration

• Truckers for a Cause- Alert, Well, And Keeping Energetic (TFAC-AWAKE), responding to requests from participants, desired to host a screener for OSA on its website.

• TFAC-AWAKE leader sought help with website screener development.

• Collaborators agreed to publish the anonymous results.

• The study was exempted by UK IRB.

Methods

• We adapted the Berlin Questionnaire (Netzer NC Ann Intern Med 1999) to be taken online.

• TFAC-AWAKE hosted the survey on their website.

• TFAC’s XM radio, word of mouth and trucking industry press contacts offered promotion.

• We collected IP addresses to ensure that each participant only took the survey once, but we collected no other identifying data.

Not all word of mouth was good…

The Berlin Questionnaire (Netzer NC Annals 1999)

1. Do you snore?2. How loud do you snore?3. How often do you snore?4. Has your snoring ever bothered other people?5. Has anyone noticed that you quit breathing during your

sleep?6. How often do you feel tired or fatigued after your sleep?7. During your waking time, do you feel fatigued, or not up

to par?8. Have you ever nodded off or fallen asleep while driving

a vehicle?9. Do you have high blood pressure?10. What is your BMI?

•I: Snoring

•II: Sleepiness

•III: Objective

The Berlin Questionnaire (Netzer NC Annals 1999)

1. Do you snore?2. How loud do you snore?3. How often do you snore?4. Has your snoring ever bothered other people?5. Has anyone noticed that you quit breathing during your

sleep?6. How often do you feel tired or fatigued after your sleep?7. During your waking time, do you feel fatigued, or not up

to par?8. Have you ever nodded off or fallen asleep while driving

a vehicle?9. Do you have high blood pressure?10. What is your BMI?

Aims and Hypotheses

• Aims– to determine if truckers would assess their OSA

risk online.– to collect demographic data from self-selected

truckers.• Hypotheses

– those with OSA symptoms (snoring, sleepiness) would be more likely to report drowsy driving, but

– objective data (BMI, hypertension history) would predict sleepy driving better than would subjective data.

•

Data analysis

• The website was active to collect data from January 11, 2010 until September 24, 2010.

• We performed Logistic Regression Analyses using the R statistical package.

Results

• 595 of CMVDs took the survey• 55.9% positive on overall Berlin

–78.3% positive on objective (BMI, bp) part• 69.6% had a BMI > 30 Kg/m 2• 47.6% had BMI > 33 Kg/m 2• 20.5% reported falling asleep while

driving (on Berlin)

Sleepy Driving Associated with…Question Significance (Logit. Regression p -value)

Overall Berlin Score 0.00Do you snore? < 0.01How loud is your snoring? < 0.0001Does your snoring bother other people? < 0.01How often do you snore? < 0.0001How often has someone noticed that you quit breathing during your sleep?

< 0.0001

How often do you feel tired or fatigued after your sleep?

0.00

During your wake time, how often do you feel fatigued, or not up to par?

0.00

What kind of commercial vehicle do you drive?

< 0.05(Commercial Vehicles the highest)

Witnessed Apneas Associated with…Question Significance (Logit. Regression p-value)Overall Berlin Score 0.00

Do you snore? Yes (p=0.00), Maybe (p=0.09)

How loud is your snoring? 0.00

Does your snoring bother other people? < 0.01

How often do you snore? 0.00

How often has someone noticed that you quit breathing during your sleep?

0.00

During your wake time, how often do you feel fatigued, or not up to par?

0.00

What kind of commercial vehicle do you drive?

< 0.05(Commercial Vehicles the lowest)

Conclusions

• This was a unique and interesting collaboration!• Truckers willingly assess their OSA risk online. • The rate of obesity is high in this group. • More than two-thirds of those who do so would be required

to undergo polysomnography (PSG) if suggested guidelines become regulation.

• Subjective symptoms were associated with sleepy driving, but objective findings were not.

• Sleep health professionals need to develop expedient, non-punitive tools to keep CMVDs healthy and driving.

OSA Increases the Risk of Crash (FMCSA, 2007, Tregear S, JCSM 2009)