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Table 3 The prevalence, score and OR (95%CI) of depression and poor QoL by quartiles of DPI

From: The association between dietary phytochemical index with depression and quality of life in iranian adolescent girls

  Quartiles of DPI P value* P trend**
Q1 Q2 Q3 Q4
Depression score 12 ± 9.59 11.82 ± 9.63 10.65 ± 9.10 9.22 ± 8.55 0.015a 0.002a
Depression prevalence 51 (27.9%)
Std. Residual = -0.5
53 (29%)
Std. Residual = -0.6
48 (26.1%)
Std. Residual = -0.2
30 (16.4%)
Std. Residual = 1.3
0.021b 0.009c
Depression Crude 1.00 1.05 (0.67-1.66) 0.91 (0.57-1.44) 0.50 (0.30-0.84) 0.009c 0.009c
Model1 1.00 1.04 (0.66-1.64) 0.91 (0.57-1.45) 0.50 (0.30-0.83) 0.008c 0.009c
Model2 1.00 1.04 (0.66-1.65) 0.93 (0.58-1.48) 0.51 (0.30-0.85) 0.010c 0.011c
Model3 1.00 1.00 (0.63-1.60) 0.84 (0.52-1.36) 0.48 (0.28-0.83) 0.008c 0.008c
QoL score 41.60 ± 8.20 41.37 ± 7.76 42.42 ± 8.28 42.87 ± 7.62 0.24a 0.067a
Poor QoL prevalence 98 (54.1%)
Std. Residual = -0.8
100 (55.6%)
Std. Residual = -1.1
86 (47%)
Std. Residual = 0.5
77 (42.3%)
Std. Residual = 1.4
0.038b 0.008c
Poor QoL Crude 1.00 1.05 (0.69-1.60) 0.75 (0.49-1.13) 0.62 (0.41-94) 0.024c 0.008c
Model1 1.00 1.05 (0.69-1.60) 0.75 (0.49-1.13) 0.62 (0.40-0.93) 0.024c 0.008c
Model2 1.00 1.06 (0.70-1.61) 0.77 (0.51-1.16) 0.63 (0.41-0.95) 0.030c 0.011c
Model3 1.00 1.11 (0.73-1.70) 0.77 (0.51-1.18) 0.67 (0.43-1.02) 0.066c 0.023c
  1. *Fourth quartile compared to first quartile.
  2. **Trends across DPI quartiles.
  3. a: Obtained from one-way ANOVA
  4. b: Obtained from chi-square
  5. c: Obtained from logistic regression
  6. Model I: Adjusted for age and energy intake
  7. Model II: Additionally, adjusted for BMI.
  8. Model III: Additionally, adjusted for physical activity, divorce of parents and death of parents.
  9. OR: odds ratio. CI: confidence interval. DPI: dietary phytochemical index. QoL: quality of life. BMI: body mass index.