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Table 2 Associations between BMI and self-reported or objectively assessed sedentary time or MVPA using linear regression in a sample of Kuwaiti adolescents

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

  MVPA Sedentary time TV viewing Videogames Computer use Total screen-time
Girls n = 234 n = 229 n = 234 n = 234 n = 232 n = 232
β (95% CIs) 0.001 (− 0.014 to 0.017) − 0.003 (− 0.006 to 0.001) − 0.17 (− 0.44 to 0.11) − 0.25 (− 0.48 to − 0.03) 0.10 (− 0.12 to 0.31) − 0.07 (− 0.20 to 0.05)
P-value 0.857 0.14 0.24 0.03 0.39 0.22
Boys n = 201 n = 190 n = 201 n = 201 n = 199 n = 199
β (95% CIs) 0.001 (− 0.014 to 0.017) 0.03 (0.00 to 0.06) − 0.03 (− 0.32 to 0.26) − 0.35 (− 0.58 to − 0.13) − 0.02 (− 0.29 to 0.24) − 0.12 (− 0.25 to 0.01)
P-value 0.857 0.04 0.83 0.002 0.85 0.06
All sample n = 435 n = 419 n = 435 n = 435 n = 431 n = 431
β (95% CIs) − 0.046 (− 0.01 to 0.008) 0.001 (− 0.01 to 0.002) − 0.13 (− 0.33 to 0.06) − 0.18 (− 0.42 to − 0.11) − 0.02 (− 0.19 to 0.14) − 0.14 (− 0.20 to − 0.028)
P-value 0.56 0.46 0.17 0.01 0.78 0.01
  1. Coefficients represent the change in one unit of BMI age Z-score for an extra 1 h spent per day in TV viewing or videogames or computer use or total screen-time or sedentary time. The model was adjusted for age, sex (in the analysis of the total sample), governorate, maternal education and moderate to vigorous physical activity (MVPA) and accelerometer wearing time. MVPA estimates were derived from the same model, i.e. they were adjusted for age, sex, governorate, maternal education, sedentary time, and accelerometer wearing time. Total screen-time = TV viewing + Videogames + Computer use
  2. OR odds ratio, CI confidence intervals