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Table 2 Associations between intestinal worm infection and thinness confounded by anemia and low IQ

From: Association between intestinal worm infection and malnutrition among rural children aged 9–11 years old in Guizhou Province, China

  Model 1 Model 2 Model 3 Model 4
Anaemia (first) Thinness Anaemia (altitude adjusted) Thinness Low process IQ Thinness Low memory IQ Thinness
Intestinal worm infection 0.19 (0.11) 0.22 (0.18) 0.24** (0.12) 0.22 (0.18) 0.61*** (0.09) 0.22 (0.18) 0.81*** (0.15) 0.22 (0.18)
Low memory IQ         0.01 (0.27)
Low process IQ       0.01 (0.18)   
Anaemia (altitude adjusted)     0.17 (0.22)     
Anaemia (first)   0.18 (0.22)       
Ethnic minority −0.11 (0.18) 1.16** (0.46) − 0.11 (0.19) 1.16** (0.46) − 0.11 (0.15) 1.15** (0.46) − 0.05 (0.23) 1.15** (0.46)
Gender −0.08 (0.11) 0.13 (0.18) −0.06 (0.12) 0.13 (0.18) 0.16* (0.09) 0.13 (0.18) 0.08 (0.13) 0.13 (0.18)
Grade −0.16*** (0.06) 0.03 (0.09) −0.18*** (0.06) 0.03 (0.09) −0.25*** (0.05) 0.02 (0.09) −0.11* (0.07) 0.02 (0.09)
Boarding 0.08 (0.13) −0.18 (0.21) 0.05 (0.13) −0.18 (0.21) 0.05 (0.10) −0.18 (0.21) 0.50*** (0.17) −0.18 (0.21)
Migrant mother 0.07 (0.14) 0.14 (0.22) 0.11 (0.14) 0.14 (0.22) −0.19* (0.11) 0.14 (0.22) −0.01 (0.16) 0.14 (0.22)
Migrant father −0.03 (0.14) 0.05 (0.21) −0.06 (0.14) 0.05 (0.21) 0.22* (0.11) 0.05 (0.21) −0.05 (0.16) 0.05 (0.21)
Household size −0.12** (0.06) −0.12 (0.09) − 0.15** (0.06) −0.12 (0.09) − 0.06 (0.04) −0.12 (0.09) − 0.11* (0.06) −0.12 (0.09)
Number of siblings −0.08 (0.08) 0.08 (0.13) −0.03 (0.09) 0.08 (0.13) −0.03 (0.06) 0.08 (0.13) 0.01 (0.09) 0.08 (0.13)
Constant −0.19 (0.37) −3.54*** (0.69) −0.15 (0.38) − 3.54*** (0.69) 1.49*** (0.30) − 3.48*** (0.70) 2.61*** (0.43) − 3.48*** (0.73)
Pseudo R2 0.0135 0.0143 0.0156 0.0142 0.0326 0.0137 0.0355 0.0137
Observations 2175 2175 2175 2175 2175 2175 2175 2175
  1. Note: ***, ** and * indicates 0.01, 0.05, and 0.10 significance level, respectively