Sleep Disorders / 2014 / Article / Tab 1

Research Article

Secondhand Smoke Exposure, Restless Sleep, and Sleep Duration in Adolescents

Table 1

Characteristics of adolescents in a study on secondhand smoke (SHS) exposure and sleep ( ,592).

Frequency of restless sleepa Totalb
Rarely or none of the time (<1 day)Some or a little of the time (1-2 days)Occasionally or a moderate amount of the time (3-4 days)Most or all of the time (5–7 days)

Demographics
Gender, (%)
 Male331 (45.5)150 (37.3)62 (32.5)35 (26.9)653 (41)
 Female 396 (54.4)252 (62.7)129 (67.5)95 (73.1)931 (59)

Age, mean (SD)
 Years14.8 (0.7)14.8 (0.6)14.9 (0.7)14.9 (0.7)14.8 (0.7)

Ethnicity, (%)
 Caucasian 386 (55.7)257 (66.6)118 (64.5)79 (64.2)868 (60)
 Aboriginal 22 (3.2)12 (3.1)9 (4.9)6 (4.9)55 (4)
 Asian 250 (36.1)96 (24.9)50 (27.3)33 (26.8)456 (31)
 Other 35 (5.1)21 (5.4)6 (3.3)5 (4.1)75 (5)

Family income, (%)
 Below average 121 (17.9)83 (22.3)54 (29.5)35 (29.4)305 (22)
 Average 236 (35.0)132 (35.4)62 (33.9)39 (32.8)492 (35)
 Above average 318 (47.1)158 (42.4)67 (36.6)45 (37.8)615 (44)

Weekday nighttime sleep, mean (SD)
 Hours8.7 (1.0)8.7 (0.9)8.5 (1.1)8.2 (1.1)8.6 (1.0)

Weekend nighttime sleep, mean (SD)
 Hours9.8 (1.0)9.9 (1.0)9.6 (1.1)9.7 (1.1)9.8 (1.0)

Adolescents’ tobacco use
Smoked in the past 30 days, (%)
 Yes28 (3.9)13 (3.2)15 (7.7)10 (7.7)76 (5)

SHS exposure
Overall SHS exposure in the past month, (%)
 Never133 (18.5)44 (11.1)17 (8.8)12 (9.4)236 (15)
 At least once in the past month321 (44.6)184 (46.2)72 (37.3)52 (40.6)661 (43)
 At least once a week187 (26.0)118 (29.6)64 (33.2)34 (26.6)423 (28)
 Every day or almost every day78 (10.8)52 (13.1)40 (20.7)30 (23.4)215 (14)

These columns display data from participants who answered both the restless sleep and the specific demographic, tobacco use, and/or SHS exposure questions.
bThis column displays data from participants who answered the specific demographic, tobacco use, and/or SHS exposure questions regardless of whether they answered the restless sleep question.