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Table 2 Baseline characteristics in the intervention and control groups

From: LINDA – a solution-focused low-intensity intervention aimed at improving health behaviors of young females: a cluster-randomized controlled trial

Characteristics Intervention group (n = 1,349) Control group (n = 1,338) Difference between groups
Age (years)    
 Median (range) 19 (17–21) 19 (17–20) p = 0.271a
BMI    
 Median (interquartile range) 22.0 (4.0) 22.3 (4.1) p = 0.029a
BMI class (%)    p = 0.470
 <18.5 6.4 6.2  
 18.5–24.9 73.8 71.8  
 25.0–29.9 15.0 16.6  
 >30 4.9 5.4  
Physical activity level (%)    p = 0.006
 Inactive 25.5 29.5  
 Walking, cycling etc. > 4 h/week 37.4 34.7  
 Dedicated fitness training or competitive athletics > 3 h/week 37.1 35.8  
Meal regularity (%)    
 Breakfast every day 57.1 55.9 p = 0.535
 Lunch every day 46.8 47.4 p = 0.752
 Dinner every day 29.8 32.5 p = 0.138
Bedtime before school-/work-days (time)    p = 0.760
 ≤22:00 13.4 14.0  
 22:30 27.3 27.0  
 23:00 30.0 29.5  
 23:30 15.5 14.4  
 ≥24:00 13.8 15.1  
Current education level (%)    p = 0.004
 High school 36.5 40.8  
 Vocational school 26.3 26.9  
 Combined high school + vocational school 5.5 7.7  
 University 24.3 18.1  
 Other 7.4 6.5  
School success b (%)    p = 0.125
 Clearly above class average 10.2 8.9  
 Slightly above class average 32.4 30.3  
 Average 48.7 49.3  
 Slightly below class average 7.7 10.2  
 Clearly below class average 1.1 1.4  
Future educational plans (%)    p = 0.145
 University 64.9 60.9  
 Upper secondary school + vocational education 3.5 3.6  
 Vocational education 9.2 8.8  
 No studies 2.0 2.4  
 Don’t know 20.3 24.3  
  1. aMann–Whitney test. Other p-values were achieved using Pearson’s Chi-square test.
  2. bSchool success was based on the girls’ own judgments.