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Table 2 Diagnostic accuracy of physical examination, transvaginal ultrasonography, and both for diagnosing surgical emergencies

From: Routine ultrasound examination by OB/GYN residents increase the accuracy of diagnosis for emergency surgery in gynecology

 

Physical examination alone

TVUS alone

Strategy combining physical examination andTVUS

 

Se% (n/N) [95% CI]

Sp% (n/N) [95% CI]

LR +

LR –

Se (n/N) [95% CI]

Sp (n/N) [95% CI]

LR+

LR –

Se (n/N) [95% CI]

Sp (n/N) [95% CI]

LR+

LR –

Overall population

87% (121/139) [82–93]

33% (31/95) [23–42]

1.3

0.4

94% (131/139) [90–98]

27% (26/95) [18–36]

1.3

0.2

99% (138/139) [98–100]

7% (7/95) [2–13]

1.1

0.1

Pregnant women

84% (81/97) [76–91]

42% (22/53) [28–55]

1.4

0.4

96% (93/97) [92–100]

13% (7/53) [4–22]

1.1

0.3

99% (96/97) [97–100]

6% (3/53) [0–12]

1.1

0.2

Non-pregnant women

95% (40/42) [89–100]

21% (9/42) [19–34]

1.2

0.2

91% (38/42) [82–99]

45% (19/42) [30–60]

1.6

0.2

100% (42/42) [92 – 100]

10% (4/42) [1–18]

1.1

0

  1. Se, sensitivity; CI, confidence interval; Sp, specificity; LR, likelihood ratio.
  2. †Corresponds to a strategy of routine TVUS regardless of the clinical findings, abnormal findings include abnormal examination OR abnormal TVUS.
  3. TVUS, transvaginal ultrasonography; Se, sensitivity; Sp, specificity; LR+, positive likelihood ratio; LR-, negative likelihood ratio; 95%CI, 95 % confidence interval.