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Table 1 Anthropometric data of study participants at baseline measurement, (Mean, standard deviation and p-value separated by group at baseline)

From: Cluster-randomized, controlled evaluation of a teacher led multi factorial school based back education program for 10 to 12-year old children

  Group N Mean SD p-values, t-test, Chi-squared-test
Age (years) Intervention 87 10.59 .438 .296
Control 85 10.52 .426
Height (m) Intervention 90 1.44 .074 .710
Control 86 1.45 .065
Body weight (kg) Intervention 90 37.49 8.10 .640
Control 86 38.04 7.26
Body-mass-index (kg/m2) Intervention 90 17.71 2.40 .718
Control 86 17.84 2.50
Performance Matthias-test (sec) Intervention 90 48.61 14.84 .058
Control 87 52.82 14.51
Amount of physical activity 1 Intervention 78    .655
Control 72   
Status of the back muscles2 Intervention 89    .313
Control 84   
Status of the Spine3 Intervention 85    .637
Control 77   
  1. 10 = never, 1 = sometimes, 2 = once a week, 3 = twice a week
  2. 21 = good, 2 = inconspicuous, 3 = lankly
  3. 31 = inconspicuous, 2 = conspicuous