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. 2019 Dec 17;29(4):382–388. doi: 10.1159/000505459

Table 1.

Demographics

Variable Invisalign aligner (n = 30) Fixed appliance (n = 30) p value
Age, years 32.9±6.9 23.6±5.3 <0.001a
Gender
 Female 20 (66.7) 21 (70.0)
 Male 10 (33.3) 9 (30.0) 0.781
Governorate
 Capital 17 (56.7) 12 (40.0) 0.269b
 Hawally 11 (36.7) 12 (40.0)
 Others 2 (6.7) 6 (20.0)
Educational level
 College and above 29 (96.7) 24 (80.0) 0.103b
 High school 1 (3.3) 6 (20.0)
Monthly income
 KWD <1,000 6 (20.0) 7 (23.3) 0.432b
 KWD 1,000−2,000 13 (43.3) 17 (56.7)
 KWD >2,000 11 (36.7) 6 (20.0)

Data are presented as n (%) or mean ± SD as appropriate. KWD 1,000 is about USD 3,297.07.

a

t test used to obtain p value.

b

Fisher's exact test used to obtain p value.