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Table 1 Outcome and predictor variables: descriptive statistics (mean, median, standard deviation and relative standard deviation)

From: Childhood overweight in Berlin: intra-urban differences and underlying influencing factors

Variable Mean Median Standard deviation Relative standard deviation
Child survey
Percentage of overweight and obese pre-school children (5–6 years) (dependent variable) 9.31 8.60 4.19 45.02
Social index (based on parents education and employment status) 13.97 14.00 1.95 13.97
Percentage of non-German children 35.78 33.40 22.57 63.09
Percentage of non German children with insufficient German language skills 8.29 6.50 8.34 100.51
Percentage of children with measles vaccination 91.15 92.40 4.18 4.59
Percentage of children with bad dental hygiene 12.39 11.20 7.24 58.41
Percentage of children participating in regular medical check-ups 87.67 88.00 4.68 5.34
Percentage of children living in household with at least one smoking parent 36.03 37.20 10.72 29.75
Percentage of children having their own TV in bedroom 11.45 10.10 7.06 61.63
Percentage of children with poor eye-hand coordination 15.63 15.40 6.80 43.50
Percentage of German children with poor language skills 11.85 9.30 8.48 71.61
Percentage of non-German children with poor language skills 20.80 20.70 13.14 63.18
Percentage of children attending Kindergarten 89.82 90.20 5.21 5.80
Environmental variables and urban characteristics
Percentage of area with vegetation 0.22 0.17 0.16 71.25
Area of parks per km2 7.1 × 10−2 5.5 × 10−2 5.2 × 10−2 73.23
Number of parks per km2 2.2 × 10−3 2.2 × 10−3 1.2 × 10−2 55.39
Area of parks per 1000 inhabitants 15.7 × 103 11.6 × 103 13.9 × 10−3 89.21
Number of parks per 1000 inhabitants 0.00 0.00 0.00 67.86
Euclidean distance to parks 429.16 330.27 326.13 75.99
Area of playgrounds per km2 6.5 × 10−3 4.6 × 10−3 5.9 × 10−3 90.82
Number of playgrounds per km2 3.7 × 10−3 2.2 × 10−3 3.5 × 10−3 95.53
Area of playgrounds per 1000 inhabitants 9.1 × 102 8.7 × 102 3.7 × 102 40.43
Number of playgrounds per 1000 inhabitants 5.1 × 10−1 4.9 × 10−1 1.8 × 10−1 34.60
Euclidean distance to playgrounds 488.96 359.74 403.17 82.45
Number of fast food restaurants per km2 3.8 × 10−6 1.5 × 10−6 5.0 × 10−6 132.29
Number of fast food restaurants per 1000 inhabitants 4.3 × 10−1 3.6 × 10−1 2.8 × 10−1 65.05
Availability of public transport 1134.74 868.42 914.95 80.63
Walkability
Connectivity −0.04 −0.09 1.00 −2377.29
Entropy −0.10 0.03 1.00 −1012.31
Population density −0.03 −0.34 1.00 −3948.53