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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: J Occup Environ Med. 2012 Aug;54(8):1017–1025. doi: 10.1097/JOM.0b013e3182572e16

Table 2.

Comparison of self-reported health conditions on the Somni-Sage®questionnaire, according to drivers’ Somni-Sage® prioritization category (male participants, n= 17,882)

Somni-Sage® Parameter Somni-Sage® prioritization* p-values
Higher Risk Class 1*(5728 drivers) n (%) Lower Risk Non-class 1 (12,154 drivers) n (%)
EDS** 944 (16.5) 708 (5.8) <0.001
Witnessed Apneas** 1085 (19) 0 (0) <0.001
Urinate at night** 1499 (26) 762 (6) <0.001
Hypertension** 2423 (42) 946 (8) <0.001
Diabetes** 991 (17) 237 (2) <0.001
Heart Problem** 278 (5) 110 (0.9) <0.001
Heart Operation** 356 (6) 177(1.5) <0.001
Heart Burn** 798 (14) 757 (6) <0.001
COPD** 29 (0.7)
3933 drivers
30 (0.25)
11,957 drivers
<0.001
Family history of Heart Disease** 408 (21)
1917 drivers
547 (11.5)
4777 drivers
<0.001
Family history of Hypertension** 1059 (55)
1917 drivers
1280 (27)
4777 drivers
<0.001
Family history of Diabetes** 812 (42)
1917 drivers
1103 (23)
4777 drivers
<0.001
Family history of Sleep Apnea** 241 (13)
1917 drivers
70 (1.5)
4777 drivers
<0.001
Family history of Cancer** 459 (24)
1917 drivers
779 (16)
4777 drivers
<0.001
Age mean [SD] 43.7 [10.7]
5656 drivers
40.1 [11.2]
11985
<0.001
BMI mean [SD] 36.4 [6.4]
5718 drivers
28.3 [5.0]
12,109 drivers
<0.001
AHI mean [SD]*** 29 [29]
2014 drivers
17 [23]
271 drivers
<0.001
ESS mean [SD] 3.9 [3.3]
5470 drivers
3.5 [3.1]
12,060 drivers
<0.001
ESS >10 n (%)
mean [SD]
247 (4.5)
5470 drivers
12.8 [2.0]
361 (3)
12,060 drivers
13.3 [2.4]
<0.001
Neck size mean [SD] 18.0 [1.6]
4561 drivers
16.4 [1.2]
8368 drivers
<0.001

BMI = body mass index; COPD = chronic obstructive pulmonary disease; EDS =excessive daytime sleepiness; ESS = Epworth sleepiness scale;

*

Class 1= high priority for further testing (PSG); Non-class 1= lower priority for further testing (PSG)

**

Number and (%) of participants that answered, “yes” on the Somni-Sage® questionnaire

EDS was considered positive if a driver had an Epworth Sleepiness Scale (ESS) ≥10 and/or answered “often” to the following question: “Do you become drowsy while driving?”