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Table 1 Clinical characteristics in patients with and without pneumoperitoneum

From: Accuracy of abdominal ultrasound for the diagnosis of pneumoperitoneum in patients with acute abdominal pain: a pilot study

  Pneumoperitoneum cases = 11 No. pneumoperitoneum controls = 11 p
 Female gender 5 (45 %) 4 (36 %) 0.5
 Age (years) 68 ± 17.1 66.4 ± 25.7 0.87
Anamnestic features
 Previous abdominal surgery 2 (18 %) 5 (45 %) 0.15
 Active neoplasia 3 (27 %) 1 (9 %) 0.29
Symptoms at presentation
 Pain scale (NRS) 7.4 ± 1.6 7.6 ± 1.3 0.77
 Vomit 2 (18 %) 4 (36 %) 0.32
Physical findings
 Signs of peritonism 6 (54 %) 5 (45 %) 0.5
 Abdominal distension 9 (81 %) 8 (72 %) 0.5
 Shock/hypotension (SBP <90 mmHg) 2 (18 %) 1 (9 %) 0.5
  1. Values are reported as mean ± standard deviation for continuous variables or as absolute number and percent value (in brackets). p significant if <0.05
  2. NRS numeric rating scale, SBP systolic blood pressure