Table 2.

Observed Frequencies for Each Haplogroup in the Whole Sample and in Asthenozoospermic versus Non-AP Populations

	Results in Populationa
	Whole Sample		Non-AP		AP
mtDNAHaplogroup	n	f	n	f	n	f
Hb	271	49.72	107	59.44	164	44.93
I	8	1.47	2	1.11	6	1.64
J	38	6.97	11	6.11	27	7.40
KU	106	19.45	31	17.22	75	20.55
L	7	1.28	2	1.11	5	1.37
M	8	1.47	1	0.56	7	1.92
O	39	7.16	10	5.56	29	7.95
Tc	31	5.69	4	2.22	27	7.40
V	21	3.85	7	3.89	14	3.84
W	6	1.10	2	1.11	4	1.10
X	10	1.83	3	1.67	7	1.92
Total	545	100.00	180	100.00	365	100.00
IWXd	24	4.40	7	3.89	17	4.66
LMOd	54	9.91	13	7.23	41	11.24

^aSamples were considered as asthenozoospermic phenotype (AP) when showing <50 % of progressive motile spermatozoa (WHO 1992). χ² = 13.873 for haplogroup distribution vs. AP or Non-AP (6 df; P=.0311). n = indicates the number of individuals; f = the frequency expressed as percentage.

^bHaplogroup H contribution to χ²=5.106 (Fisher’s exact test P=.0019). Difference in frequency distribution from the expected values for haplogroup H in non-AP population: P=.0014

^cHaplogroup T contribution to χ²=5.676 (Fisher’s exact P=.0168). Difference in frequency distribution from the expected values for haplogroup T in the AP population: P=.0142.

^dIWX and LMO represent the added frequencies of I, W, and X and of L, M, and O, respectively.