Table 2.

Body mass index stratified analysis of the association between Dietary Inflammatory Index (DII) and depression

	Model 1	Model 2	Model 3
BMI <24.00 (normal weight)
Quartile 1 (n=180）	1.00 (Ref)	1.00 (Ref)	1.00 (Ref)
Quartile 2 (n=232）	1.08 (0.92–1.18)	1.06 (0.82–1.16)	1.05 (0.86–1.18)
Quartile 3 (n=221）	1.12 (0.86–1.25)	1.15 (0.92–1.28)	1.18 (0.92–1.26)
Quartile 4 (n=189）	1.16 (0.95–1.28)	1.21 (0.96–1.46)	1.32 (0.98–1.52)
P-trend	0.28	0.16	0.08
24.00≤BMI<28.00 (overweight)
Quartile 1 (n=215）	1.00 (Ref)	1.00 (Ref)	1.00 (Ref)
Quartile 2 (n=194）	1.09 (0.89–1.25)	1.08 (1.01–1.26)	1.10 (1.03–1.29)
Quartile 3 (n=184）	1.13 (1.02–1.32)	1.15 (1.05–1.29)	1.21 (1.09–1.37)
Quartile 4 (n=187）	1.25 (1.08–1.46)	1.31 (1.11–1.52)	1.35 (1.13–1.56)
P-trend	0.03	0.01	0.006
BMI≥28.00 (obese)
Quartile 1(n=109）	1.00 (Ref)	1.00 (Ref)	1.00 (Ref)
Quartile 2 (n=80）	1.08 (1.01–1.19)	1.15 (1.05–1.29)	1.18 (1.09–1.35)
Quartile 3 (n=99）	1.21 (1.10–1.39)	1.28 (1.13–1.46)	1.32 (1.19–1.58)
Quartile 4 (n=132）	1.39 (1.19–1.52)	1.42 (1.21–1.62)	1.56 (1.23–1.78)
P-trend	0.008	0.005	0.003

Model 1 is not adjusted.

Model 2 adjusts age, sex, employment, education, daily energy intake, tobacco smoking, alcohol drinking and physical activities.

Model 3 adjusts age, sex, employment, education, tobacco smoking, alcohol drinking, physical activities, diabetes and hypertension.

BMI, body mass index.