1. Data Format

Built-in demo data: China 0-18 years growth standard (Capital Institute of Pediatrics).

Custom upload: Excel with columns: Age, P3, P10, P25, P50, P75, P90, P97. Four sheets named: boy_height, boy_weight, girl_height, girl_weight.

2. How to Use

• Click 'Use Demo Data' or upload your own standard table
• Select gender and enter child's birth date, height, weight
• Click 'Run Analysis' to see Gaussian distributions
• Click 'Predict Future Height' to see growth prediction

3. Percentile Interpretation

• P50: Average (median) level
• P25-P75: Normal range (50% of children)
• P3-P25: Below average, monitor growth velocity
• < P3: Short stature, medical evaluation recommended
• > P97: Above average, monitor for precocious puberty

4. Prediction Method

Uses the child's current percentile position projected onto future age's P50 +/- SD curve, with 95% confidence interval.