The potential role of central obesity in male infertility: body mass index versus waist to hip ratio as they relate to selected semen parameters

Table 3 Linear regression results for both non-standradized and standarzied BMI and WHR values

Non-standarzied Variable	Parameter	95% Confidence Limits		Standard	t Value	Pr > \|t\|
Non-standarzied Variable	Estimate	95% Confidence Limits		Error	t Value	Pr > \|t\|
Concentration
BMI	−0.91	−1.65	−0.18	0.37	−2.45	0.01
age	0.19	−0.27	0.66	0.24	0.82	0.41
WHR	−84.93	− 131.71	−38.15	23.84	−3.56	0.00
age	0.24	−0.23	0.70	0.24	1.00	0.32
Progressive motility
BMI	−0.32	−0.56	− 0.07	0.12	−2.56	0.01
age	−0.11	−0.27	0.04	0.08	−1.43	0.15
WHR	− 33.99	−49.59	− 18.40	7.95	−4.28	<.0001
age	−0.09	− 0.25	0.06	0.08	−1.15	0.25
Normal morphology
BMI	−0.07	−0.13	− 0.01	0.03	−2.15	0.03
age	−0.04	−0.08	0.00	0.02	−2.09	0.04
WHR	−4.49	−8.32	−0.65	1.95	−2.30	0.02
age	−0.04	−0.08	0.00	0.02	−2.09	0.04
Total sperm count
BMI	−3.62	−6.14	−1.09	1.29	−2.81	0.01
age	0.05	−1.55	1.66	0.82	0.07	0.95
WHR	− 409.00	− 569.64	− 248.36	81.87	−5.00	<.0001
age	0.36	−1.24	1.95	0.81	0.44	0.66
Standardized Variable	Parameter	95% Confidence Limits		Standard	t Value	Pr > \|t\|
Standardized Variable	Estimate	95% Confidence Limits		Error	t Value	Pr > \|t\|
Concentration
sBMI	−30.25	−54.45	−6.05	12.34	−2.45	0.01
age	0.19	−0.27	0.66	0.24	0.82	0.41
sWHR	−49.69	−77.05	−22.32	13.95	−3.56	0.00
age	0.24	−0.23	0.70	0.24	1.00	0.32
Progressive motility
sBMI	−10.55	−18.63	−2.46	4.12	−2.56	0.01
age	−0.11	−0.27	0.04	0.08	−1.43	0.15
sWHR	−19.89	−29.01	−10.77	4.65	−4.28	<.0001
age	−0.09	−0.25	0.06	0.08	−1.15	0.25
Normal morphology
sBMI	−2.17	−4.15	−0.19	1.01	−2.15	0.03
age	−0.04	−0.08	0.00	0.02	−2.09	0.04
sWHR	−2.63	−4.87	−0.38	1.14	−2.30	0.02
age	−0.04	−0.08	0.00	0.02	−2.09	0.04

ISSN: 1471-2458