Skip to main content

Table 3 Characteristics of the study participants according to sleep duration categories; values are mean ± SD

From: Associations of short sleep duration with prehypertension and hypertension among Lithuanian children and adolescents: a cross-sectional study

Variables <7 h/day 7– < 8 h/day ≥8 h/day P*
Boys: (n = 261) (n = 576) (n = 2352)  
Age (years) 13.74 ± 1.12a 13.69 ± 1.08a 13.35 ± 1.11 <0.001
Weight (kg) 58.34 ± 12.99a 57.78 ± 12.53a 54.24 ± 13.07 <0.001
Height (cm) 169.30 ± 11.92a 168.88 ± 10.79a 165.88 ± 11.43 <0.001
BMI (kg/m2) 20.16 ± 3.01a 20.08 ± 3.06a 19.49 ± 3.16 <0.001
SBP (mmHg) 124.54 ± 15.32a 126.47 ± 15.93a 120.47 ± 15.84 <0.001
DBP (mmHg) 65.87 ± 8.43a 66.18 ± 8.23a 64.83 ± 7.65 <0.001
Girls: (n = 343) (n = 878) (n = 2530)  
Age (years) 13.75 ± 1.11a 13.74 ± 1.05a 13.29 ± 1.08 <0.001
Weight (kg) 55.61 ± 11.13a,b 53.96 ± 10.49a 50.60 ± 10.39 <0.001
Height (cm) 165.07 ± 6.56a 164.17 ± 7.92a 162.08 ± 8.00 <0.001
BMI (kg/m2) 20.33 ± 3.53a 19.93 ± 3.09a 19.16 ± 3.17 <0.001
SBP (mmHg) 119.84 ± 13.07a,b 117.38 ± 12.54a 113.91 ± 11.62 <0.001
DBP (mmHg) 68.62 ± 8.26a,b 66.97 ± 7.85a 65.24 ± 7.41 <0.001
All participants: (n = 604) (n = 1454) (n = 4882)  
Age (years) 13.74 ± 1.12a 13.72 ± 1.06a 13.32 ± 1.10 <0.001
Weight (kg) 56.79 ± 12.03a,b 55.47 ± 11.49a 52.36 ± 11.89 <0.001
Height (cm) 166.90 ± 9.49a 166.03 ± 9.45a 163.91 ± 9.98 <0.001
BMI (kg/m2) 20.26 ± 3.32a 19.99 ± 3.08a 19.32 ± 3.17 <0.001
SBP (mmHg) 121.87 ± 14.27a 120.98 ± 14.67a 117.07 ± 14.20 <0.001
DBP (mmHg) 67.43 ± 8.44a,b 66.66 ± 8.01a 65.04 ± 7.53 <0.001
  1. SD standard deviation, BMI body mass index, SBP systolic blood pressure, DBP diastolic blood pressure.
  2. aSignificantly different (P < 0.05) from group of ≥8 h/day (Mann–Whitney U test).
  3. bSignificantly different (P < 0.05) from group of 7– < 8 h/day (Mann–Whitney U test).
  4. *Differences between the three groups were determined by Kruskal-Wallis test.