Table 5.

Sensitivity analysis for the risk of dementia after ECT in Fine and Gray's survival analysis model.

Tracking interval	Study sample of subgroups	No competing risk in the model			Competing risk in the model
		Adjusted HR	95% CI	P	Adjusted HR	95% CI	P
Whole period	Total	0.777	0.582–1.298	0.236	0.764	0.538–1.086	0.133
	Schizophrenia	0.528	0.316–1.203	0.308	0.518	0.304–1.023	0.152
	Bipolar disorder	1.692	0.605–2.861	0.267	1.616	0.584–2.385	0.228
	Major depressive disorder	0.942	0.604–3.460	0.249	0.865	0.563–2.919	0.208
0–1 year	Total	0.991	0.651–1.508	0.264	0.971	0.638–1.478	0.213
	Schizophrenia	0.673	0.353–1.398	0.297	0.660	0.346–1.370	0.277
	Bipolar disorder	2.158	0.677–3.324	0.342	2.115	0.663–3.238	0.322
	Major depressive disorder	1.201	0.676–4.020	0.254	1.177	0.662–3.940	0.224
3–6 years	Total	1.821	0.728–4.556	0.200	1.782	0.714–4.469	0.198
	Schizophrenia	1.237	0.398–4.224	0.135	1.211	0.390–4.414	0.112
	Bipolar disorder	7.635	0.837–23.627	0.264	7.490	0.821–23.178	0.245
	Major depressive disorder	2.207	0.756–12.148	0.346	2.165	0.742–11.187	0.313
≧6 years	Total	0.685	0.513–2.065	0.123	0.671	0.502–2.024	0.114
	Schizophrenia	0.462	0.278–1.060	0.377	0.452	0.272–1.038	0.376
	Bipolar disorder	1.491	0.533–2.521	0.277	1.460	0.522–2.486	0.273
	Major depressive disorder	0.803	0.532–3.048	0.298	0.813	0.521–2.984	0.288

HR, hazard ratio; CI, confidence interval; Adjusted HR: Adjusted for gender, age, comorbidities, urbanization level, location, and insured premium.