growth_standards 4.5.0

A Dart implementation of various growth standards, WHO, CDC, Fenton, Intergrowth, etc.

Various Growth Standards implementation in Dart

Example below

import 'dart:convert';

import 'package:growth_standards/growth_standards.dart';

final birthDay = Date(year: 2022, month: Months.june, date: 30);
const weight = Mass$Kilogram(12.1);
const length = Length$Centimeter(82);

final age = Age.byDate(birthDay);
final gs = GrowthStandard.who.fromBirthTo5Years;
const sex = Sex.male;

void main() {
  print(
    'Age: ${age.yearsMonthsDaysOfAge.years} Years, ${age.yearsMonthsDaysOfAge.months} Months, ${age.yearsMonthsDaysOfAge.days} Days',
  );

  // WHO Length-for-Age
  final calcLengthForAgeStanding = gs.lengthForAge(
    age: age,
    lengthHeight: length,
    sex: sex,
    measure: LengthHeightMeasurementPosition.standing,
  );
  print('Length-for-age Z-Score: ${calcLengthForAgeStanding.zScore(Precision.two)}');
  print('Length-for-age Percentile: ${calcLengthForAgeStanding.percentile(Precision.two)}');

  // WHO Weight-for-Age
  final calcWeightForAge = gs.weightForAge(
    age: age,
    weight: weight,
    sex: sex,
  );
  print('Weight-for-age Z-Score: ${calcWeightForAge.zScore(Precision.two)}');

  // Fenton 2013 Preterm Growth Chart (sex-specific LMS)
  final fentonWeight = GrowthStandard.fenton.weightForAge(
    sex: Sex.male,
    age: const PostmenstrualAge.completedWeeks(32),
    weight: const Mass$Kilogram(1.88),
  );
  print('Fenton 32w Weight Z-Score: ${fentonWeight.zScore()}');
}

For updated example and usage check the test files (test/golden_vectors_test.dart, test/edge_cases_test.dart)

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