/* create a function to calculate the bode index in copd */ function bodeIndex(FEV1, mMRC, 6MWT) { var bodeIndex = 0; if (FEV1 < 50) { bodeIndex += 4; } else if (FEV1 < 60) { bodeIndex += 3; } else if (FEV1 < 80) { bodeIndex += 2; } else if (FEV1 < 90) { bodeIndex += 1; } if (mMRC >= 2) { bodeIndex += 4; } else if (mMRC == 1) { bodeIndex += 3; } if (6MWT < 350) { bodeIndex += 4; } else if (6MWT < 450) { bodeIndex += 3; } else if (6MWT < 550) { bodeIndex += 2; } else if (6MWT < 650) { bodeIndex += 1; } return bodeIndex; }