Table 1.

Demographic characteristics of the study population (TS. Total sample, n = 2535; 1. Spain, n = 388; 2. Italy, n = 376; 3. Lebanon, n = 487; 4. Nigeria, n = 561; 5. Turkey, n = 410; 6. Ukraine, n = 313).

	Sample Nationality							Cross-Country Comparison
	TS	1	2	3	4	5	6
Age
Mean	20.60	21.37	21.78	20.25	19.95	21.53	18.69	χ2/df = 30.4
SD	2.04	2.07	1.79	1.13	2.36	1.41	1.34	p < 0.001
Sex (%)
Male	26.75	20.10	21.01	41.27	31.20	20.24	19.81	χ2/df = 17.94
Female	73.25	79.90	78.99	58.73	68.80	79.76	80.19	p < 0.001
Branch (%)
Health Sci.	28.28	25.77	23.40	20.94	61.50	3.66	21.41	χ2/df = 45.90
Social Sci.	32.66	37.11	10.37	51.64	17.11	54.88	23.32	p < 0.001
Pure Sci.	10.25	12.89	2.66	13.35	12.66	12.19	4.47
Humanities	17.59	15.21	35.37	3.90	1.60	25.12	39.30
Engineering	5.56	0.51	8.77	6.16	7.13	0.00	11.50
Other	5.64	8.50	19.41	4.11	0.00	4.15	0.00
Vaccination (%)
Yes	76.41	96.40	96.01	87.47	37.61	92.93	58.79	χ2/df = 156.73
No	23.59	3.60	3.99	12.53	62.39	7.07	41.21	p < 0.001

Note: Sci. = Science.