Table 1.

Mean and standard deviation age of study samples by four groups (1A, 1B, 2A, and 2B)

Groups	Age (mean±SD)
Group 1A	57.63±13.65
Group 1B	60.50±0.71
Group 2A	63.75±8.03
Group 2B	63.97±8.60

SD: Standard deviation