Table 1 Sample size determination to assess the magnitude of in-hospital mortality and its associated factors among patients undergone laparotomy at tertiary hospitals, West Oromia, Ethiopia, 2022 (for second objective)
Variables | Proportion | OR | Two-sided confidence level | Power | Sample size | ||
|---|---|---|---|---|---|---|---|
Associated factors mortality | Age > 65years (20/49) | P1 | 0.408 | 9.6 | 95 | 80 | 40(ref. [14]) |
Reference (22/469) | P1 | 0.046 | |||||
Presence of pre-op sepsis | P1 | 0.19% | 6.7 | 95 | 80 | 90 (ref. [14]) | |
Reference/unexposed | P2 | 0.0125% | |||||
Mechanism of injury/Blunt (7/49) | P1 | 0.143% | 7.25 | 95 | 80 | 332(ref. [15]) | |
Reference/penetrating(4/80) | P2 | 0.05% | |||||
SBP< 90mmmHg(8/24) | P1 | 0. 33% | 8.6 | 95 | 80 | 50 (ref. [15]) | |