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Table 3 Multivariable linear regression model for association between CHC status and serum ferritin

From: Iron deficiency among low income Canadian toddlers: a cross-sectional feasibility study in a Community Health Centre and non-Community Health Centre sites

Predictor β (log) 95% CI Change in serum ferritin, % Change in median serum ferritin P
μg/l 95% CI
CHC, yes 0.17 −0.10, −0.45 19.12 4.78 −2.46, 14.34 0.22
Age, mo −0.0006 −0.01, 0.01 0.06 0.14 −0.15, 0.18 0.87
Female sex 0.08 0.003, 0.16 8.01 2.00 0.07, 4.25 0.06
Income
 $0–29,999 −0.23 −0.41, − 0.04 −20.17 −5.04 −8.48, − 0.89 0.02*
 $30,000-79,999 0.02 −0.11, 0.15 1.97 0.49 −2.69, 4.12 0.77
 ≥$80,000 (Reference)
Maternal education (Post-secondary, no) 0.08 −0.09, 0.24 7.93 1.98 02.10, 6.79 0.36
zBMI, unit −0.07 − 0.10,-0.03 −6.49 −1.62 −2.49, 0.71 0.0006*
Breastfeeding duration, mo −0.01 −0.02, − 0.01 − 1.46 −0.37 − 0.54, − 0.20 <.0001*
Milk consumption (>  2 cups daily) − 0.11 −0.20, − 0.02 − 10.37 −2.59 −4.49, − 0.52 0.02*
Meat / fish consumption daily 0.01 − 0.04, 0.06 0.94 0.24 − 0.91, 1.44 0.69
CRP (mg/L) 0.07 0.05, 0.10 7.69 1.92 1.17, 2.70 < 0.0001*
Iron/ multivitamin supplementation 0.04 −0.16, 0.25 4.50 1.13 −3.80, 7.20 0.68
  1. zBMI indicates body mass index z score; CI indicates confidence interval; CRP indicates C-reactive protein
  2. Adjusted β estimates are reported to 2 decimal points for statistical precision. Negative values indicate a decrease in median serum ferritin, positive values indicate an increase in median serum ferritin. *indicates statistically significant effects
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