Table 3.

Threshold effect analysis of dietary inflammatory index (DII) on Alzheimer’s dementia (inflection point = 1.30)

	HR (95% CI)	P value
DII below 1.30 (per 1 increase)
Model1	0.954 (0.892–1.022)	0.179
Model2	0.962 (0.899–1.030)	0.268
Model3	0.964 (0.900–1.032)	0.286
DII above 1.30 (per 1 increase)
Model1	1.399 (1.093–1.792)	0.008
Model2	1.388 (1.082–1.780)	0.010
Model3	1.391 (1.085–1.784)	0.009

Model 1 was adjusted for age, sex, ethnicity, education, Townsend deprivation index and energy intake. Model 2 was further adjusted for diabetes, blood pressure status, drinking status, smoking status, body mass index, physical activity. Model 3 was adjusted for the same variables as in Model 2 and further for family history of dementia. Italics represents P-value < 0.05