Table 2 Assessment of the risks for fertility: mean values and standard deviations for the 3 subgroups as compared by a univariate ANOVA. The factors were estimated according to a scale from 1 (“no, that does not apply to me”) to 5 (“yes, that applies to me” (factors that were evaluated to be significantly different are printed in bold type).

Factor	M – MS	SD – MS	M – AS	SD – AS	M – BS	SD – BS	M – total	SD – total	F(2)	p
MS: medical students, AS: students from other faculties, BS: vocational trainees, M: mean value, SD: standard deviation, univariate ANOVA: F(df): F value, df: degree of freedom (= 2), p: significance, error probability p < 0.05
Drugs	4.63	0.78	4.72	0.73	4.51	1.10	4.63	0.88	2.42	0.090
Increasing age in women	4.78	0.57	4.63	0.70	4.43	1.06	4.61	0.80	7.34	0.001
Hormone disorders	4.86	0.49	4.50	0.91	4.31	1.09	4.55	0.90	15.59	< 0.001
Radiation/irradiation	4.77	0.56	4.49	0.84	4.36	1.13	4.54	0.89	9.07	< 0.001
Alcohol	4.52	0.75	4.57	0.72	4.42	1.01	4.51	0.83	1.55	0.214
Smoking	4.46	0.84	4.49	0.83	4.38	0.97	4.45	0.88	0.76	0.467
Chemotherapy	4.73	0.64	4.37	0.91	4.25	1.16	4.44	0.95	11.55	< 0.001
Diseases of the genital organs	4.39	0.80	4.29	0.88	4.21	1.06	4.30	0.92	1.35	0.261
Doping	4.50	0.85	4.19	0.98	4.17	1.20	4.28	1.03	5.15	0.006
Genetic predisposition	4.36	0.82	4.24	0.86	4.01	1.19	4.21	0.97	5.12	0.006
Injuries/operations in the genital region	4.39	0.78	4.10	1.00	4.02	1.13	4.17	0.99	6.20	0.002
Stress	4.41	0.67	4.09	0.78	3.99	0.94	4.16	0.82	10.97	< 0.001
Underweight	4.68	0.69	4.00	1.05	3.82	1.35	4.15	1.12	28.29	< 0.001
Use of medicaments	4.13	0.86	4.13	0.90	4.08	1.11	4.11	0.95	0.15	0.862
Sexually transmitted diseases	4.29	0.98	3.86	1.09	3.95	1.25	4.02	1.12	6.90	0.001
Overweight	3.80	1.14	3.69	1.21	3.84	1.29	3.77	1.22	0.69	0.504
Reversal of a sterilisation	3.84	1.19	3.83	1.15	3.56	1.39	3.75	1.25	2.66	0.071
Increasing age in men	3.65	1.28	3.74	1.31	3.72	1.44	3.70	1.34	0.21	0.815
Depression	3.78	0.99	3.56	1.10	3.55	1.26	3.62	1.12	2.11	0.122
Mental stress	3.92	0.94	3.47	1.20	3.29	1.33	3.55	1.20	11.74	< 0.001
Environmental pollution	3.84	1.01	3.43	1.00	3.25	1.25	3.50	1.11	11.58	< 0.001
Physical complaints	3.41	1.11	3.33	1.05	3.35	1.14	3.36	1.10	0.26	0.775
Chronic diseases	3,63	1.16	3.27	1.03	3.14	1.18	3.34	1.14	8.04	< 0.001
Anxiety disorder	3.67	1.05	3.25	1.12	3.13	1.27	3.34	1.17	9.40	< 0.001
Diseases of the immune system	3.45	0.91	3.24	1.01	3.11	1.13	3.26	1.03	4.34	0.014
Paediatric diseases, e. g., mumps	3.50	1.35	3.06	1.31	2.99	1.32	3.18	1.34	6.78	0.001
Competitive sports	3.53	1.16	2.84	1.23	2.65	1.24	2.99	1.27	22.32	< 0.001
Sleeping problems	2.79	0.92	2.79	1.06	2.81	1.22	2.79	1.07	0.11	0.989
Lack of exercise	2.63	1.12	2.76	0.98	2.88	1.26	2.76	1.12	2.02	0.134