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Table 5 Significant predictors of pica in a logistic regression model1

From: Pica associated with iron deficiency or depletion: clinical and laboratory correlates in 262 non-pregnant adult outpatients

Variable Beta coefficient Standard error (SE) Wald Coefficient/SE Probability Odds ratio (exponential beta) 95% Confidence interval of odds ratio
age, y -0.190 0.009 -2.242 0.025 0.981 (0.965, 0.998)
MCV, fL -0.024 0.008 -3.119 0.002 0.977 (0.962, 0.991)
RDW, % 0.105 0.032 3.328 0.001 1.111 (1.044, 1.182)
Platelets × 109/L 0.002 0.001 2.288 0.022 1.002 (1.000, 1.004)
  1. 1These results, obtained in a forward stepwise logistic regression model, include only the significant independent predictors of pica occurrence. Abbreviations: MCV, mean corpuscular volume; RDW, red blood cell distribution width. Significance of this regression: Chi-square (4 degrees of freedom) = 30.42; probability <0.0001.