Table 3. Alterations in 477 samples analyzed based on the 1999 and 2010 WHO classifications.
Variables N=477 %
1999 WHO classification
    Total concentration < 40 million
    Concentration/ml < 20 x 106
    Motility a + b < 50%
    Morphology < 14%
    With alterations – 4 general criteria*
    With at least 2 alterations		 163
170
310
335
401
293		 34.2
35.6
65.0
70.2
84.1
61.4
2010 WHO classification
    Total concentration < 39 million
    Concentration/ml < 15 x 106
    Motility a + b < 32%
    Morphology < 4%
    With at least 1 abnormal parameter*
    With at least 2 abnormal parameters*		 162
146
151
50
223
112		 34.0
30.6
31.7
10.5
46.8
23.5
TMSC (x106)
    < 20
    ≥ 20		 200
277		 41.9
58.1

* The patient had alteration in any of the four parameters (total concentration, concentration ml, motility and morphology). TMSC: Total Motile Sperm Count; WHO: World Health Organization