Correlates of preventable adverse events assessed using a multiple logistic regression model
| Variables | β | SE | Wald | df | p Value | OR (95% CI for OR) |
| Age categories (1) | 7.97 | 4.00 | 0.09 | |||
| <1 year | 0.49 | 0.38 | 1.71 | 1.00 | 0.19 | 1.63 (0.78 to 3.41) |
| 1–15 years | −0.41 | 0.39 | 1.10 | 1.00 | 0.29 | 0.66 (0.31 to 1.43) |
| 16–45 years | −0.12 | 0.18 | 0.43 | 1.00 | 0.51 | 0.89 (0.62 to 1.27) |
| 46–65 years | −0.03 | 0.18 | 0.03 | 1.00 | 0.87 | 0.97 (0.68 to 1.39) |
| Department categories (2) | 14.67 | 4.00 | 0.01 | |||
| Surgical and gynaecological specialties | −0.33 | 0.16 | 4.05 | 1.00 | 0.04 | 0.72 (0.52 to 0.99) |
| Obstetrics | 0.64 | 0.31 | 4.41 | 1.00 | 0.04 | 1.90 (1.04 to 3.48) |
| Paediatrics | −0.60 | 0.38 | 2.48 | 1.00 | 0.12 | 0.55 (0.26 to 1.16) |
| Intensive care and allied services | −0.35 | 0.24 | 2.13 | 1.00 | 0.14 | 0.70 (0.44 to 1.13) |
| Complexity of the hospital (3) | 0.66 | 0.34 | 3.90 | 1.00 | 0.05 | 1.94 (1.01 to 3.76) |
| Type of adverse event (4) | 18.83 | 5.00 | 0.00 | |||
| Related to medication | −0.71 | 0.29 | 6.17 | 1.00 | 0.01 | 0.49 (0.28 to 0.86) |
| Related to a nosocomial infection | −0.21 | 0.21 | 1.05 | 1.00 | 0.31 | 0.81 (0.54 to 1.21) |
| Related to a procedure | −0.44 | 0.22 | 3.98 | 1.00 | 0.05 | 0.65 (0.42 to 0.99) |
| Related to a diagnosis | 0.69 | 0.37 | 3.58 | 1.00 | 0.06 | 2.00 (0.98 to 4.09) |
| Other | −0.60 | 0.37 | 2.58 | 1.00 | 0.11 | 0.55 (0.27 to 1.14) |
| Type of admission (5)—urgent | −0.39 | 0.19 | 4.30 | 1.00 | 0.04 | 0.67 (0.46 to 0.98) |
| Country (6) | 19.15 | 4.00 | 0.00 | |||
| Country 2 | 0.09 | 0.21 | 0.17 | 1.00 | 0.68 | 1.09 (0.72 to 1.67) |
| Country 3 | −0.65 | 0.21 | 9.96 | 1.00 | 0.00 | 0.52 (0.35 to 0.78) |
| Country 4 | −0.15 | 0.21 | 0.52 | 1.00 | 0.47 | 0.86 (0.57 to 1.30) |
| Country 5 | 0.23 | 0.19 | 1.48 | 1.00 | 0.22 | 1.26 (0.87 to 1.82) |
| Constant | 0.59 | 0.45 | 1.69 | 1.00 | 0.19 | 1.80 |
Reference categories: (1) patients >65-years-old; (2) medical specialties; (3) secondary hospitals of intermediate complexity with at least surgical theatres, and postsurgical resuscitation wards; (4) related to patient management and nursing care; (5) planned admission; (6) country 1.