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Table 1 Characteristics of participants in the study of health and activity among adolescents in Kuwait (SHAAK)

From: Associations between objectively assessed and questionnaire-based sedentary behaviour with body mass index and systolic blood pressure in Kuwaiti adolescents

  Boys (n = 201) Girls (n = 234)
Age (year) 15.9 (14.7–17.3) 16.0 (14.6–17.6)
Height (cm) 169.0 (168.0–171.0)*** 156.0 (155.0–157.0)
Weight (kg) 70.8 (58.9–91.3)*** 58.4 (46.1–67.5)
BMI (kg m−2) 24.4 (20.6–30.8)** 23.3 (19.1–26.9)
BMI for age Z-score 1.31 ± 1.60*** 0.81 ± 1.47
Weight status based on the IOTF
 Overweight/obesity (% total sample) 24.3/35.5 31.8/15.9
 Systolic blood pressure (mmHg) 115.6 ± 19.91*** 101.5 ± 12.39
 Maternal education level (n, %)
  Lowa 15 (7.5) 25 (10.7)
  Mediumb 27 (13.4) 35 (15.0)
  Highc 159 (79.1) 174 (74.4)
Questionnaire based behaviour
 TV-viewing (h/day) 1.5 (1.5–2.5) 2.5 (1.5–2.6)***
 Videogames (h/day) 1.5 (0–1.5)*** 0 (0–1.5)
 Computer use (h/day) 0 (0–1.5) 1.5 (0–1.5)**
 Total screen-time (h/day) 3 (1.5–4.5) 4 (3–5.5)
  Boys (n=162) Girls (n= 189)
Accelerometry
 Wear time (h/day) 13.9 (11.9–15.9) 14.3 (12.0–16.6)
 Sedentary time (min/day) 492 (431–565) 567 (489–635)***
 Moderate to vigorous (min/day) 19 (10.4–30.6)*** 8.75 (4.8–16.7)
  1. Continuous variables are shown as median (interquartile range) or mean (standard deviation) according to their distribution. n = number of participants. For categorical variables, n and percentages are shown. Maternal education level: a Low, read and write, intermediate (Grades 7–9); b Medium, secondary (Grades 10–12); c High, at least University degree. Total screen-time = TV viewing + Videogames + Computer use. P-values for sex differences using Mann–Whitney U Test (non-parametric) or Chi Square Test (categorical): *≤ 0.05; **≤ 0.01; ***≤ 0.001
  2. IOTF International Obesity Task Force