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. 2010 Jun 1;33(6):819–824. doi: 10.1093/sleep/33.6.819
Question Sleep testing (n = 159) No sleep testing (n = 80) Total (n = 239) P value
1. Do you snore?

    Yes 156 (100) 79 (100) 235 (100) 1a
    No (skip to Q6) 0 0 0
    I don't know (skip to Q6) 0 0 0

If you snore:
2. Your snoring is:

    Slightly louder than breathing 44 (46.8) 24 (63.2) 68 (51.5) 0.02b
    As loud as talking 30 (31.9) 12 (31.6) 42 (31.8)
    Louder than talking 12 (12.8) 2 (5.3) 14 (10.6)
    Very loud – can be heard in adjacent rooms 8 (8.5) 0 (0) 8 (6.1)

3. How often do you snore?

    Nearly every day 29 (29.3) 8 (21.1) 37 (27) 0.86b
    3 to 4 nights per week 28 (28.3) 14 (36.8) 42 (30.7)
    1 to 2 nights per week 26 (26.3) 12 (31.6) 38 (27.7)
    1 to 2 nights per month 10 (10.1) 4 (10.5) 14 (10.2)
    Never or nearly never 6 (6.1) 0 (0) 6 (4.4)

4. Has your snoring ever bothered other people?

    Yes 76 (75.2) 19 (48.7) 95 (67.9) 0.003a
    No/I don't know 25 (24.8) 20 (51.3) 45 (32.1)

5. Has anyone noticed that you quit breathing during your sleep?

    Nearly every day 13 (13) 3 (7.9) 16 (11.6) 0.30a
    3 to 4 times a week 5 (5) 3 (7.9) 8 (5.8)
    1 to 2 times a week 12 (12) 1 (2.6) 13 (9.4)
    1 to 2 times a month 8 (8) 4 (10.5) 12 (8.7)
    Never or nearly never 62 (62) 27 (71.1) 89 (64.5)

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

    Nearly every day 16 (10.3) 12 (15.8) 28 (12.1) 0.45b
    3 to 4 times a week 27 (17.4) 6 (7.9) 33 (14.3)
    1 to 2 times a week 50 (32.3) 22 (28.9) 72 (31.2)
    1 to 2 times a month 42 (27.1) 21 (27.6) 63 (27.3)
    Never or nearly never 20 (12.9) 15 (19.7) 35 (15.2)

7. During your waking time, do you feel tired, fatigued or not up to par?

    Nearly every day 17 (11) 10 (13) 27 (11.7) 0.91b
    3 to 4 times a week 21 (13.6) 10 (13) 31 (13.4)
    1 to 2 times a week 43 (27.9) 21 (27.3) 64 (27.7)
    1 to 2 times a month 48 (31.2) 19 (24.7) 67 (29)
    Never or nearly never 25 (16.2) 17 (22.1) 42 (18.2)

8. Have you ever nodded off or fallen asleep while driving a vehicle?

    Yes 156 (100) 77 (100) 233 (100) 1a
    No/I don't know 0 0 0

9. If YES, How often does this occur?

    Nearly every day 3 (4.7) 2 (6.9) 5 (5.4) 0.91b
    3 to 4 times a week 0 0 0
    1 to 2 times a week 5 (7.8) 0 5 (5.4)
    1 to 2 times a month 15 (23.4) 8 (27.6) 23 (24.7)
    Never or nearly never 41 (64.1) 19 (65.5) 60 (64.5)

10. During the past month, how many hours of actual sleep each night did you get?

7 (6-7.5) 7 (6-7.5) 7 (6-7.5) 0.56c

Data are presented as number (%), except question #10, which is median (interquartile range). Denominators vary across rows due to missing data.

a

Pearson χ test.

b

Mantel-Haenszel χ test of linear-by-linear association.

c

Wilcoxon-Mann-Whitney test.