Table 4: Arithmetic means in the OHIP-14-PD by age groups in GPS and DCS.

Age
groups		 GPS DCS
N M SD N M SD
18 and 19 7 10.00 5.00 30 14.60 10.43
20 to 29 52 9.60 6.18 56 13.86 10.52
30 to 39 68 13.68 7.86 27 20.67 8.93
40 to 49 59 13.98 9.97 48 21.69 10.54
50 to 59 39 12.46 9.14 67 20.21 11.74
60 or more 31 11.06 7.81 21 15.14 11.23
Total 256 12.32 8.35 249 18.01 11.15

N = Sample size. M = Arithmetic Mean, SD = Standard Deviation.