text: Yo, check it out, I got the facts to bring,
  Talkin' 'bout P wave duration and P dispersion, let me sing.
  We studied 232 healthy kids, young and bright,
  Aged 7 to 15, to shed some light.
  
  Boys and girls, no difference we found,
  Max P wave duration, holdin' steady on the ground.
  103 plus or minus 9.5, no disparity in sight,
  Girls at 102 plus or minus 8.4, keepin' it tight.
  
  P dispersion, another stat we explore,
  No gender gap, nothin' more.
  27.2 plus or minus 5.3 for the boys,
  Girls at 26.8 plus or minus 6.2, no toys.
  
  Age, my friend, plays a part,
  In P wave duration and P dispersion, it's an art.
  A correlation we see, it's real,
  With P wave duration, r equals 0.23, the deal.
  
  P dispersion, it ain't far behind,
  With r equals 0.16, age defined.
  So remember, when checkin' the health of kids,
  Age matters, don't miss out, that's what it bids.
  
  So, there you have it, the facts remain,
  P wave duration and P dispersion, age's domain.
  Consider it all when you analyze,
  For healthy kids, it's no surprise.