Relationship between DII score with anthropometric indices and
PSQI score
The Association between DII score with
anthropometric variables including
weight, BMI, WC, HC, AVI, BAI, and
conicity index and PSQI score is illustrated in Table 3.
According to continuous DII, in
the unadjusted model, there was a significant negative association
between DII score with weight, BMI, WC, HC, AVI, BAI, and conicity index
(p for all < 0.05); however, in Model 1 and after adjustment
for energy intake this negative correlation disappeared and a positive
correlation was found, but it was not statistically significant for all
anthropometric variables (p ≥ 0.05) (Table 3).
Regarding the Association between DII score (continuous DII) as an
independent variable and PSQI continuous score as dependent variables,
in the unadjusted model, there was
no significant association between these two variables (β-Coefficients =
0.18 and p = 0.1). While, in adjusted models, there was a significant
positive association between DII and sleep score (model
1: β-Coefficients = 0.29 and p =
0.02, model 2: β-Coefficients = 0.30 and p = 0.02). Also, according to
quartiles of the DII, there was a significant positive association
between DII and sleep score in all 3 models, unadjusted, model 1, and
model 2 (unadjusted: β-Coefficients = 0.41 and p = 0.04, model 1:
β-Coefficients = 0.61 and p = 0.008, and model 2: β-Coefficients = 0.60
and p = 0.01, respectively ) (Table 3).
Odds ratios (95%CI) for obesity
and sleep quality, according to
quartiles of DII, are presented in Table 4. There was a significant
difference in the odds ratios between the quartile 1 (the reference
quartile) (unadjusted model: OR=
0.33 (CI: 0.14-0.74), P for trend =0.002; model 1: OR= 0.31(CI:
0.12-0.78), P for trend = 0.005; model 2:OR=0.30 (CI:0.12-0.78), P for
trend = 0.005) to quartile 4(unadjusted model: OR= 1.13(CI: 0.45-2.80);
model 1: OR= 1.11(CI: 0.44-2.79); model 2:OR=1.13(CI:0.44-2.87), P for
trend = 0.005). Also, odds ratios increased significantly from quartile
2 to quartile 4 in all models for DII and sleep quality.
On the other hand, according to the continuous score of DII, there was a
significant positive association between DII and sleep quality in all 3
models: unadjusted, model 1, and model 2 (OR= 1.21 (CI: 1.05-1.40), OR=
1.21 (CI: 1.03-1.43), and OR= 1.22 (CI: 1.03-1.44), respectively(Table 4).