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Table 3 MLPT results by gestational age: % [95 % CI*] (n)

From: Self-administered multi-level pregnancy tests in simplified follow-up of medical abortion in Tunisia

  n = 341a
Proportion of women with a decline in hCG who did not have ongoing pregnancy (negative predictive value)  
 ≤ 63 days gestation 100.0 [98.8–100.0] (298/298)
 64–70 days gestation 96.9 [83.8–99.9] (31/32)
Proportion of women with ongoing pregnancy whose follow-up MLPT indicated steady or increasing hCG (sensitivity)  
 ≤ 63 days gestation 100.0 [15.8–100.0] (2/2)
 64–70 days gestation 50.0 [1.3–98.7] (1/2)
Proportion of women with steady or increasing hCG who had ongoing pregnancy (positive predictive value)  
 ≤ 63 days gestation 20.0 [2.5–55.6] (2/10)
 64–70 days gestation 100.0 [2.5–100.0] (1/1)
Proportion of women without ongoing pregnancy whose follow-up MLPT indicated decreasing hCG (specificity)  
 ≤ 63 days gestation 97.4 [94.9–98.9] (298/306)
 64–70 days gestation 100.0 [88.8–100.0] (31/31)
  1. *95 % CIs calculated using exact binomial confidence intervals
  2. aWomen with follow-up MLPT data and abortion outcome at 1st follow-up; 2 of the follow-up MLPTs were conducted in the clinic; the rest were conducted by the woman at home