Table 2 Results of the multivariate logistic regression analysis on associated factors of lower gastrointestinal perforation.

Elderly (> 65 years old)

0.79 [0.32–1.92]

Time for visit after 24 h

1.05 [0.40–2.74]

Presence of fever

2.09 [0.90–4.83]

Absence of abdominal tenderness

3.27 [0.90–11.90]

Elevated C-reactive protein(above 10 mg/L)

1.29 [0.44–3.78]

Night shift

1.16 [0.47–2.91]

First visit at teaching hospital

1.23 [0.46–3.25]

Unavailability of urgent radiology reports

3.15 [0.97–10.20]

First visit at clinic

2.45 [0.71–8.42]

Examined by a non-generalist

3.46 [1.13–10.60]