Table 2. Correlation between expression of Rab proteins and litter size before capacitation

Litter size ≥ 14 Litter size < 14
Rab3A
 Expression of Rab3A ≤ 0.0956 11 2
 Expression of Rab3A > 0.0956 5 13
 Sensitivity 68.75
 Specificity 86.67
 Negative predictive value 72.22
 Positive predictive value 84.62
 Overall accuracy 77.42
Rab4
 Expression of Rab4 ≤ 0.0945 7 1
 Expression of Rab4 > 0.0945 9 14
 Sensitivity 43.75
 Specificity 93.33
 Negative predictive value 60.87
 Positive predictive value 87.50
 Overall accuracy 67.74
Rab5
 Expression of Rab5 ≤ 0.1083 8 0
 Expression of Rab5 > 0.1083 8 15
 Sensitivity 50.00
 Specificity 100.00
 Negative predictive value 65.22
 Positive predictive value 100.00
 Overall accuracy 74.19
Rab8A
 Expression of Rab8A ≤ 0.1069 11 0
 Expression of Rab8A > 0.1069 5 15
 Sensitivity 68.75
 Specificity 100.00
 Negative predictive value 75.00
 Positive predictive value 100.00
 Overall accuracy 83.87
Rab9
 Expression of Rab9 ≤ 0.1026 10 5
 Expression of Rab9 > 0.1026 5 11
 Sensitivity 66.67
 Specificity 68.75
 Negative predictive value 68.75
 Positive predictive value 66.67
 Overall accuracy 67.74
Rab25
 Expression of Rab25 ≤ 0.0945 10 5
 Expression of Rab25 > 0.0945 6 10
 Sensitivity 62.50
 Specificity 66.67
 Negative predictive value 62.50
 Positive predictive value 66.67
 Overall accuracy 64.52
Sensitivity = [A / (A + C)] × 100; Specificity = [D / (B + D)] × 100; Positive predictive value = [A / (A + B)] × 100; Negative predictive value = [C / (C + D)] × 100; and overall accuracy = [(A + D) / (A + B + C + D)] × 100.