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Table 2 General characteristics of subjects at baseline

From: Effectiveness of a school-based physical activity intervention on obesity in school children: a nonrandomized controlled trial

Characteristic Total Intervention group Control group P value
  (N = 921) (N = 388) (N = 533)  
Age, mean (SD), y 10.4 (2.2) 10.2 (2.3) 10.6 (2.2) 0.009
Sex, no. (%)
Boys 489 (53.1) 204 (52.6) 285 (53.5) 0.788
Girls 432 (46.9) 184 (47.4) 248 (46.5)  
Body mass index, mean (SD), kg/m2 19.59 (4.41) 19.12 (4.28) 19.93 (4.47) 0.006
Overweight/obesity, no. (%) 339 (36.8) 128 (33.0) 211 (39.6) 0.040
Waist circumference, mean (SD), cma 67.94 (12.74) 65.68 (12.62) 69.58 (12.58) <0.001
Skinfold thickness, mean (SD), mma
Triceps skinfold 15.08 (7.03) 14.45 (7.28) 15.55 (6.82) 0.019
Subscapular skinfold 12.75 (7.86) 11.94 (8.13) 13.34 (7.61) 0.007
Abdominal skinfold 17.46 (11.80) 15.84 (12.34) 18.64 (11.26) <0.001
Serum lipids, mean (SD), mmol/La
Total cholesterol 3.94 (0.68) 4.02 (0.68) 3.88 (0.68) 0.002
Triglycerides 0.81 (0.41) 0.85 (0.40) 0.79 (0.42) 0.031
HDL-C 1.43 (0.28) 1.46 (0.29) 1.40 (0.28) 0.004
LDL-C 2.38 (0.60) 2.34 (0.58) 2.41 (0.62) 0.088
Fasting glucose, mean (SD), mmol/La 4.79 (0.49) 4.99 (0.46) 4.65 (0.45) <0.001
Duration of MVPA (min/day)b 45.8 (55.1) 44.7 (45.7) 46.6 (60.7) 0.627
In school 29.0 (35.2) 27.4 (26.0) 30.1 (40.3) 0.283
Out of school 16.8 (30.1) 17.2 (28.6) 16.4 (31.1) 0.716
  1. aDenominators varied because of missing data. (In intervention group, 2 missed in waist circumference, 4 missed in serum lipids and fasting glucose; in control group, 1 missed in waist circumference and skinfold thickness, 3 missed in serum lipids and fasting glucose).
  2. bSubjects with complete 7-day records were included in analysis (334 in intervention group, 483 in control group).
  3. HDL-C: high density lipoprotein cholesterol.
  4. LDL-C: low density lipoprotein cholesterol.
  5. MVPA: moderate to vigorous physical activity.