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Table 2 Transverse interpremolar and intermolar widths

From: Possible causal relationships between competitive swimming in growing age and three-dimensional dentoalveolar development

Variable Swimmers Non-swimmers P(Student's t test)
Interpremolar width
Mean ± SD (mm) 30.7 ± 2.1 30.2 ± 3.0 NS
Range (mm) 26 to 37 23 to 36  
Intermolar width
Mean ± SD (mm) 47.9 ± 3.6 47.4 ± 3.6 NS
Range (mm) 40 to 59 38 to 55  
  1. SD, standard deviation; NS, not significantly different.