Table I. Socio-demographic characteristics of the subjects and audiometric derived measure of hearing thresholds (PTA) in HL and NH groups.

	NH (n = 109)	HI (n = 94)	Statistics	df	p
Sex
Male	48 (44.0%)	41 (43.6%)	Χ2 = 0.004	1	0.95
Female	61 (56.0%)	53 (56.4%)
Age (yrs) Mean (SD)	47.8 (10.0)	50.7 (10.7)	t = -1.7	201	0.09
Education (yrs) Mean (SD)	10.4 (4.1)	9.5 (4.2)	t = 1.4	201	0.15
Occupation
Professional	53 (48.6%)	47 (50%)	Χ2 = 0.038	1	0.84
Non-professional	56 (51.4%)	47 (50%)
Marital status
Married	69 (63.3%)	60 (63.8%)	Χ2 = 0.06	1	0.94
Single	40 (36.7%)	34 (36.2%)
PTA (dB HL) Mean (SD)	15.3 (3.7)	44.1 (10.9)	t = -25.8	201	0.005