Table 3

Comparisons of cognitive function measures across different BMI groupsa
Characteristic Underweight (n = 57) Normal weight (n = 358) Overweight (n = 319) Obese (n = 162) F p value
WAIS-R Digit Symbol 47.5 ± 15.8 48.3 ± 14.1 46.6 ± 12.8 44.0 ± 13.2 3.922 0.009b
Trail Making Test A 56.6 ± 23.7 52.5 ± 24.3 54.9 ± 29.5 55.6 ± 27.3 0.842 0.471
Trail Making Test B 112.3 ± 59.0 106.7 ± 54.6 114.4 ± 61.4 123.7 ± 55.5 2.784 0.040c
WCST Perseverative Errors 40.4 ± 25.8 42.7 ± 24.7 42.9 ± 23.7 41.6 ± 26.5 0.241 0.868
WCST Categories Completed 2.7 ± 2.2 2.5 ± 2.1 2.6 ± 2.1 2.8 ± 2.2 0.491 0.688
WAIS-R Digit Span 12.0 ± 3.8 12.5 ± 3.5 12.3 ± 3.1 11.9 ± 3.0 1.606 0.186
WMS-R Visual Reproduction 8.9 ± 2.8 9.3 ± 3.0 8.6 ± 2.9 8.2 ± 3.5 5.921 0.001d
Composite z score 0.10 ± 0.09 0.20 ± 0.03 0.10 ± 0.03 0.01 ± 0.05 4.365 0.005e

a Asian BMI categories(kg/m2): underweight (< 18.5), normal weight(18.5-22.9), overweight (23–27.4) and obese (≥ 27.5); Data are presented as mean ± SD.

bnormal weight vs obese, P = 0.001; cnormal weight vs obese, P = 0.004; dnormal weight vs obese, P = 0.001;normal weight vs overweight, P = 0.012 e normal weight vs obese, P = 0.004;

Abbreviation: WAIS, Wechsler Adult Intelligence Scale-Revised; WCST, Computerized Wisconsin Card Sorting Test; WMS-R, Wechsler Memory Scale-Revised; BMI, Body mass index.

Guo et al.

Guo et al. BMC Psychiatry 2013 13:109   doi:10.1186/1471-244X-13-109

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