Anthropometry
BMI (measured in kg/m2) was evaluated from baseline
(time of transplant) to up to five years post-transplant. Height and
weight data were collected during clinic visits using a metric scale and
wall mounted stadiometer. BMI from patients less than 20 years old were
converted to percentiles using age appropriate scales. For patients
younger than 2 years, the ”Child Growth Standards” SAS macro supplied by
the World Health Organization (WHO) was used.19 For
patients 2 – 20 years old, we used an SAS program from the Centers for
Disease Control and Prevention.20 Percentiles were
stratified to weight groups according to the following: obese
(> 95%), overweight (85 – 94.9%), normal weight
(5 – 84.9%), and underweight (< 5%). For patients older
than 20 years old, we used the WHO criteria for
adults21 to stratify BMI according to the following:
obese (> 30 kg/m2), overweight (25
– 29.9 kg/m2), normal weight (18.5 – 24.9
kg/m2), and underweight (< 18.5
kg/m2).