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Table 5 Relations between serum progesterone cut off levels and viability of the pregnancy

From: Relation between single serum progesterone assay and viability of the first trimester pregnancy

Variables Viable Non-viable
Pregnancy group (Total number = 178) Pregnancy group (Total number = 82)
Serum Progesterone at cut off level 10 ng/ml
Number of cases with serum progesterone < 10 ng/ml (%) 12 (6.7%) 65 (79.3% = sensitivity)
Number of cases with serum progesterone > 10 ng/ml (%) 166 (93.3% = specificity) 17 (20.7%)
Serum Progesterone at cut off level 20 ng/ml
Number of cases with serum progesterone < 20 ng/ml (%) 2 (1.1%) 78 (95.1% = sensitivity)
Number of cases with serum progesterone > 20 ng/ml (%) 176 (98.9% = specificity) 4 (4.8%)