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Table 4 Compatibility between experimental groups in relation to initial severity of anteroposterior relationship of dental arches (Chi-square test)

From: Treatment effects of the Jasper Jumper and the Bionator associated with fixed appliances

Severity of class II G1 Jasper (n = 25) G2 Bionator (n = 30) P
¼ Class II 0 0 0.4769 χ 2 = 1.4808
½ Class II 4 (16%) 9 (30%)
¾ Class II 9 (36%) 9 (30%)
Complete class II 12 (48%) 12 (40%)
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