Background and aims. The prognostic value of gender and baseline body mass index (BMI) z-score for child weight correction results vary a lot between different programmes. The aim of this study was to find the best available predictors of success in the first paediatric weight correction programme in Latvia. 
Methods. The respondents of this study were patients of Weight Correction Programme at Children’s Clinical University Hospital in Riga. The inclusion criteria: first day in programme from August 2014 until June 2017; at least 5 years old; at least one follow-up visit data available. Further on random sample was obtained from all patients that met inclusion criteria. The main outcome was the number of good responders – those that reduced BMI z-score by at least .20 units. The predictors were evaluated by using binary logistic regression. The probability value p < .05 was considered significant.
Results. There were 135 (75%) respondents randomly included from all 181 that met the inclusion criteria. The mean age was 12.0 (SD 2.7) years. There were 61 (45%) boys. 46 (34%) patients managed to reduce their BMI z-score by at least .20 units. The regression results are shown in table 1.
Conclusions. Boys have higher odds to reduce their BMI z-score by at least .20 units than girls. Baseline BMI z-score is a positive predictor – the more excess weight in the first place, the biggest chance of clinically significant BMI z-score reduction afterwards.

CHILD’S GENDER AND BASELINE BMI Z-SCORE – THE MAIN PREDICTORS OF SUCCESS IN THE FIRST PAEDIATRIC WEIGHT CORRECTION PROGRAMME IN LATVIA