Table 3.

The results of subgroup analyses and interaction analyses

Variables	OR	95% CI	P	P for interaction
Age				< 0.001*
< 35 years	6.847	3.115–15.255	< 0.001*
≥ 35 years	0.857	0.388–1.878	0.700
Hypertension				0.402
No	2.634	1.416–4.909	0.002*
Yes	2.116	0.634–7.196	0.225
Diabetes				0.351
No	2.799	1.523–5.157	0.001*
IGT	0.288	0.029–2.542	0.270
Yes	2.684	0.397–19.365	0.316

^*Statistically significant (P < 0.05)

Adjusted for age, hypertension and diabetes. Stratified variables were not adjusted in the subgroup analysis