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Table 4 Correlation and regression analysis between time and seminal parameter levels in Indian fertile and infertile men

From: Decline in seminal quality in Indian men over the last 37 years

Variables Fertile Infertile Total
n r b p value (tb) n r b p value (tb) n r b p value (tb)
Semen volume 53 0.12 0.012 0.408 22 0.06 0.020 0.778 75 0.10 0.015 0.391
Sperm concentration 112 −0.17 −0.635 0.071 59 −0.25* −1.467 0.060 171 −0.25*** −1.270 < 0.001
Total motility 89 0.10 0.133 0.371 44 −0.30* −1.112 0.046 133 −0.14 −0.350 0.103
RLPM 30 −0.23 −0.570 0.232 21 −0.40 −1.191 0.073 51 −0.26 −0.903 0.066
Normal morphology 62 −0.39** −1.030 0.002 35 −0.29 −1.181 0.090 97 −0.39*** −1.272 < 0.001
Viability 30 0.00 0.003 0.989 14 −0.35 −0.672 0.213 44 −0.14 −0.282 0.362
  1. *- p < 0.05, **- p < 0.01, ***- p < 0.001. n = number of observations, r = correlation value, b = regression coefficient value, RLPM: rapid linear progressive motility