As shown in Table 1, LD, ALC, and PSU groups were not significantly different on age and BMI, but LD had significantly more years of education than ALC and PSU. ALC participants had significantly lower pre-albumin levels than LD and PSU, whereas PSU had significantly lower white blood cell counts than LD and ALC; however, pre-albumin levels and white blood cell counts in all groups were within the normal range. Covarying for these variables did not change the results of our main analyses. No other clinical laboratory measures differed significantly among groups.
