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Table 4 Mean IGF-1 level (ng/ml) with respect to orthopedic and orthodontic treatment class

From: Serum IGF-1 levels as a clinical tool for optimizing orthodontic treatment timing

Group Subjects Mean IGF-1 (ng/ml) SD Median 95% confidence interval for mean p value
Lower bound Upper bound
Class 1 30 335 12.6 333 310 360 0.006
Class 2 15 280 10.8 285 258 302  
  1. SD, standard deviation; Class 1, orthopedic treatment class; Class 2, orthodontic treatment class.