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Table 1 Basic characteristics of participants by gender

From: Associations of sedentary behavior and physical activity with physical measurements and dyslipidemia in school-age children: a cross-sectional study

  Boys Girls
Number of participants, n 398 372
Average age, year (mean ± SD) 9.3 ± 1.8 9.4 ± 1.7
Living areas, n
 Urban 311 272
 Rural 87 100
Anthropometric measurements (mean ± SD)
 Height, cm 136.1 ± 11.2 136.5 ± 11.4
 Weight, kg 33.1 ± 11.2 32.1 ± 10.0
 BMI z-score 0.24 ± 1.53 −0.05 ± 1.33
 WHR 0.84 ± 0.06 0.821 ± 0.06
 WHtR 0.45 ± 0.05 0.44 ± 0.04
SB, n
 Screen timea
  Any item ≥1.0 h/day 172 139
  All items <1.0 h/day 226 233
 Other leisure-time SBb
  Either item ≥1.0 h/day 121 121
  both items <1.0 h/day 277 251
PA, n
 Leisure-time PAc
   < 60 mins/week (lowest 25%) 86 59
   ≥ 60 mins/week (highest 75%) 254 266
 School-time PAd
   < 100 mins/week (lowest 25%) 51 71
   ≥ 100 mins/week (highest 75%) 276 235
Blood lipid profiles, mmol/L (mean ± SD)
 TC 3.84 ± 0.64 3.86 ± 0.67
 TG 0.97 ± 0.55 1.02 ± 0.57
 HDL-C 1.47 ± 0.34 1.44 ± 0.31
 LDL-C 1.87 ± 0.51 1.89 ± 0.55
 Prevalence of dyslipidemia, n 47 37
  1. Significant difference between groups were marked in bold. Differences between genders were calculated by t-tests for continuous variables and Rao-Scott χ 2 test for categorical variables (clustering in class level and strata in grade level and investigation area level were considered)
  2. SB sedentary behavior, PA physical activity
  3. ascreen time includes Watching TV; Watching video, VCD, or DVD; Using a computer; Using a cell phone
  4. bOther leisure time SB includes Reading, writing, drawing; Playing chess, playing with toys or dolls while sitting; and other sedentary behaviors
  5. cLeisure-time PA includes running, swimming, riding bicycles, playing football, basketball, table tennis, badminton, dancing, climbing mountains, skating, rope skipping, playing hopscotch, rubber band skipping, beanbag games, other group games (chasing or romping), and other physical activities
  6. dSchool-time PA includes physical education classes and calisthenics during the break