Table 1. Descriptive statistics of the demographic variables, social network size and olfactory performance.

	Minimum	Maximum	Mean	SD
Education (year)	4	21	13.23	3.55
Smoking index	0	42	4.55	9.72
Social network size	6	44	18.65	10.94
Identification	8	14	11.48	1.50
Discrimination	10	15	12.97	1.45
Threshold/Sensitivity	3.25	12.50	7.90	2.23