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Table 2 Calculated OHD based on results from measurements on photographs

From: Occlusal height difference between maxillary central and lateral incisors: should aesthetic perception influence bracket placement?

Group mean sd min max P-Value
1 (dental advertisements) 1.39 0.30 0.69 1.75 >  0.05 n.s.
2 (fashion advertisements) 1.34 0.35 0.81 2.10 >  0.05 n.s.
3 (orthodontic advertisements) 1.23 0.41 0.00 1.84 >  0.05 n.s.
4 (orthodontic textbooks) 0.62 0.18 0.33 0.98 < 0.001*
  1. n.s., statistically not significant; *, P < 0.001; OHD, Occlusal height difference