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Table 2 Comparison of semen parameters among six provinces (ANOVA)

From: Effects of manganese on routine semen quality parameters: results from a population-based study in China

 

N

Semen volume (ml)

Sperm density (×106/ml)

Sperm viability (%)

Progressive motility (%)

Normal morphology (%)*

Hebei

196

2.4 (0.4) b

63.5 (23.3) b

66.6 (5.0) c

42.1 (4.9) c

33.3 (1.8) e

Henan

184

2.2 (1.2) c

84.0 (50.5) a

68.6 (16.4) c

46.9 (14.1) b

54.9 (21.9) b

Shanxi

199

2.1 (0.3) c

85.9 (36.3) a

58.9 (11.2) d

53.2 (10.8) a

44.8 (11.5) c

Guizhou

193

2.4 (1.2) b

53.2 (33.9) c

78.4 (8.2) a

43.7 (9.5) c

37.7 (8.04) d

Zhejiang

205

2.6 (1.5) b

80.3 (57.8) a

74.3 (15.5) b

48.2 (18.7) b

33.8 (12.9) e

Shandong

202

2.9 (1.0)a

66.2 (33.9) b

72.3 (7.8) b

49.0 (12.9) b

59.4 (12.8) a

  1. Note: Values given as mean ±standard deviation. *P<0.05. a, ,b denote different means if the letters are not the same.