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Table 5. Allelic frequency in men with normozoospermia (n = 186) and nonobstructive azoospermia (n = 341) (P < .05 by ${chi}$ ² test)

Allele (-29-307-680)	Normozoospermia		Azoospermia
Allele (-29-307-680)	%	(n)	%	(n)

1. A-Thr-Asn	11.3	(42)	10.6	(72)
2. A-Ala-Ser^*	5.4	(20)	9.1	(62)
3. G-Thr-Asn^*	40.6	(151)	33.1	(226)
4. G-Ala-Ser	25.5	(95)	26.7	(182)
5. Undecided ${dagger}$	17.2	(64)	20.5	(140)

*P < .01 by Fisher's exact test
${dagger}$ Group 5 consists of alleles 1, 2, 3, and 4, which cannot be distinguished and are included in the statistical analysis as "dummy" variables