Hyponatremia Is a Specific Marker of Perforation in Sigmoid Diverticulitis or Appendicitis in Patients Older Than 50 Years

Table 2

Prevalence and mean values (standard deviation) of markers of infectious colon perforation.

	Colon perforation (𝑛=103)	No colon perforation (𝑛=179)	𝑃<0.001^b
Fever (>37.5°C)	28%	13%	𝑃=0.002^a
Body temperature (°C)	37.2 (0.8)	36.8 (0.7)	𝑃<0.001^b
Tachycardia (>100 bpm)	21%	9%	𝑃=0.006^a
Heart rate (bpm)	87.2 (20.5)	80.7 (15.0)	𝑃=0.005^b
Hyponatremia (<136 mmol/L)	29%	16%	𝑃=0.013^a
Sodium (mmol/L)	136.9 (3.3)	138.4 (3.0)	𝑃<0.001^b
Markedly elevated CRP (>50 mg/L)	80%	60%	𝑃=0.001^a
CRP (mg/L)	131.3 (91.1)	85.1 (68.7)	𝑃<0.001^b
Symmetroid high T-waves (>2/3 R-wave)	13%	11%	𝑃=0.671^a
AV blocks	1.1%	4.4%	𝑃=0.257^a
Pain score (1–10)	4.4 (3.0)	3.9 (2.8)	𝑃=0.436^b
Systolic blood pressure (mm Hg)	136.0 (21.5)	139.1 (21.7)	𝑃=0.278^b
Hematocrit (%)	42.7 (4.6)	41.7 (4.6)	𝑃=0.090^b
Potassium (mmol/L)	4.2 (0.40)	3.9 (0.40)	𝑃=0.175^b
Creatinine (umol/L)	84.7 (37.8)	79.4 (28.2)	𝑃=0.283^b

^aTwo-tailed Fisher’s exact test; ^bWilcoxon rank sum test; bpm: beats per minute; CRP: C-reactive protein.