Table 4.

Multivariate logistic regression analyses of variables associated with problem of medium or high severity raised in the complaints

Variable	Odds ratio	95% confidence interval	P value
Analysis 1 (based on the 1029 complaints)
Complaint to the ICUs	1.769	1.260–2.484	0.001
Relationship as the main problem domain	1.523	1.121–2.069	0.007
“Care on the ward” as the main stage of care	1.203	0.909–1.592	0.197
Any harm	6.100	3.602–10.332	< 0.001
Doctor as the main staff group referred to	2.637	1.837–3.787	< 0.001
Complaint issued by family member or surrogate	1.036	0.739–1.453	0.338
Female complainer	1.148	0.865–1.525	0.027
Complaint issued via feedback sheet	0.717	0.533–0.964	< 0.001
Analysis 2 (based on the 1259 problems)
Complaint to the ICUs	1.838	1.361–2.482	< 0.001
Relationship as the problem domain	1.608	1.230–2.102	0.001
“Care on the ward” as the stage of care	1.220	0.946–1.572	0.125
Any harm	6.295	4.008–9.887	< 0.001
Doctor as the staff group referred to	2.150	1.565–2.955	< 0.001
Complaint issued by family member or surrogate	0.977	0.720–1.326	0.882
Female complainer	1.288	1.001–1.659	0.049
Complaint issued via feedback sheet	0.726	0.556–0.947	0.018