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. 2018 Mar 23;88(4):390–396. doi: 10.2319/082317-571.1

Table 1.

Study Group Comparisonsa

Group
 N
 Genderb
 Dental Agec
Male
 Female
 T1, Mean ± SD
 T2, Mean ± SD
Control sample 30 11 19 8.30 ± 0.75 9.42 ± 0.92
Treatment sample 30 11 19 8.36 ± 0.70 9.47 ± 0.94
Significance P = 1.00 P = .890 P = .860
a 

T1 indicates before expansion; T2, after expansion; SD, standard deviation.

b 

Gender: male vs female.

c 

Dental age as assessed by Demerjian.23