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Table 2 Baseline characteristics at individual and cluster levela

From: A school-based intervention improved dietary intake outcomes and reduced waist circumference in adolescents: a cluster randomized controlled trial

  Intervention group Control Group
Individual level n Mean ± SD or % n Mean ± SD or %
 Age (y) 696 12.9 ± 0.8 692 12.9 ± 0.8
 Girls (%) 702 66.2 699 58.2
 Better off (%) 670 68.2 655 67.5
 Remittances from abroad (%) 643 23.8 636 16.5
 Snack allowance (%) 651 82.5 643 82.9
 Amount of snack allowance ($) 642 0.9 ± 0.6 653 0.9 ± 0.6
 Education of the father (years) 568 12.1 ± 4.8 571 12.2 ± 4.9
 Education of the mother (years) 611 11.8 ± 4.7 613 11.5 ± 4.8
Cluster level n Median (25th–75th) or % n Median (25th–75th) or %
 Students per school (n) 10 751 (335–1169) 10 787 (326–1335)
 Public schools (%) 10 50.0 10 50.0
 Co-ed. schools (%) 10 70.0 10 70.0
 Monthly fee ($) 10 7.00 (0.0–68.3) 10 6.50 (0.0–81.8)
 Morning schools (%) 10 60.0 10 60.0
  1. aSummary statistics adjusted for the cluster design