Table 1: The characteristics of 632 contemporary UK adolescents according to weekday sleep duration

From: Exploring the complex pathways among specific types of technology, self-reported sleep duration and body mass index in UK adolescents

CharacteristicsWeekday sleep durationP-value
Sex, n (%)
 Boys, 228 (36.1)8.43±1.480.43
 Girls, 404 (63.9)8.34±1.29 
   
Age, n (%)
 Younger adolescent, 381 (60.3)8.76±1.35<0.001
 Older adolescent, 251 (39.7)7.79±1.17 
   
Ethnicity, n (%)
 White, 221 (35.0)8.19±1.120.001
 Asian, 300 (47.5)8.53±1.41 
 Black, 62 (9.8)8.66±1.47 
 Other, 49 (7.7)7.92±1.71 
   
School, n (%)  
 Secondary, 359 (56.8)8.65±1.44<0.001
 Grammar, 152 (24.1)7.85±1.14 
 Independent, 121 (19.1)8.21±1.16 
   
BMIa, n (%)
 Underweight/normal weight, 469 (74.2)8.53±1.24<0.001
 Overweight/obese, 163 (25.8)7.92±1.57 
   
Technology use, n (%)
 Weekday computer use <0.001
  Yes, 403 (63.8)8.16±1.38 
  No, 229 (36.2)8.75±1.24 
 Weekday mobile telephone use <0.001
  Yes, 474 (75.0)8.22±1.32 
  No, 158 (25.0)8.83±1.39 
 Weekday TV viewing <0.001
  Yes, 407 (64.4)8.22±1.40 
  No, 225 (35.6)8.66±1.24 
 Weekday video gaming 0.01
  Yes, 296 (46.8)8.23±1.50 
  No, 336 (53.2)8.50±1.22 
  1. aBody mass index (BMI) categories calculated using standard definition.30
  2. Data are presented as mean±s.d. Younger adolescent (11–14 years); older adolescent (15–18 years).