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Table 2 Comparison of biomarkers median values of seminal pools used in the EQA program with reference values reported in the literature [12,13,14,15,16]

From: External quality assessment program for biochemical assays of human seminal plasma: a French 6-years experience

 

Results from surveys a

Median (Min-Max)

1991 [12]

Mean (Q1-Q3) b

2000 [13]

Median (Q1-Q3)

2002 [14]

Median (Q1-Q3)

2004 [15]

Mean (Q1-Q3)

2010 [16]

Mean (Q1-Q3)

Number of control patients c

NA

25

19

230

71

100

Citrate (mmol/L)

27.6

27.8

28.6

NR

NR

NR

 

(24.0–29.1)

(18.7–36.9)

(18.6–32.9)

   

Zinc (mmol/L)

2.11

2.9

NR

NR

NR

NR

 

(1.7–2.3)

(1.8–4.0)

    

Fructose (mmol/L)

16

14.2

12.8

NR

13.9

14.6

 

(14.4–17.8)

(10.0–18.4)

(10.0–18.2)

 

(9.4–17.6)

(11.2–18.0)

Total α-1,4 Glucosidase (UI/L)

19.2 (17.6–21.9)

27.0 (18.2–35.8)

NR

23.8 (15.3–32.4)

NR

NR

Neutral α-1,4 Glucosidase (UI/L)

NR

19.5 (12.1–26.9)

24.3 (17.1–31.4)

20.2 (12.3–28.1)

NR

14.1 (6.9–21.3)

  1. aExtracted from Table 1
  2. bOriginal data or derived from reported Mean and SD
  3. cFathers or normozoospermic patients
  4. NR Not reported