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Table 1 Descriptive statistics of infant maltreatment rates and perinatal risk factors

From: Identifying perinatal risk factors for infant maltreatment: an ecological approach

Variables Min Max Mean Standard Deviation Skewness Number of outliers
       Lower Upper
Infant maltreatment rates
Rate 0.0 186.9 24.4 23.0 1.58 0 62
Transformed rate 0.4921 5.2844 3.1190 0.8225 -0.37 7 0
Perinatal risk factors: individual
Gestation weeks <37 2.4 32.7 11.7 3.4 0.69 2 24
Birth weight <2500 g 0.0 24.6 8.0 3.2 0.78 0 22
5-Minute APGAR Score <7 0.0 7.8 1.3 1.0 1.27 0 46
Prenatal care less than adequate 0.4 57.1 23.4 11.4 0.40 0 0
Maternal age <20 0.0 39.3 14.9 7.6 0.10 0 3
Maternal education < HS 0.0 80.3 25.0 14.0 0.40 0 8
Unmarried mother 1.3 97.1 40.3 21.7 0.50 0 0
Three or more siblings 0.0 32.2 9.4 4.4 1.32 0 62
Mother smoked during pregnancy 0.0 46.2 9.4 6.6 1.15 0 31
Medicaid beneficiary 0.7 94.8 48.7 21.1 -0.34 0 0
Perinatal risk factors: composite
Child_risk 2.4 34.7 15.0 4.3 0.55 1 15
Composite_risk1 0.0 38.8 10.5 6.9 0.79 0 29
Composite_risk2 0.0 43.3 12.8 8.1 0.70 0 23