GOLD 4 - very severe: FEV1 <30% predicted

Sibling codes

• XS7U – GOLD 2 - moderate: 50% ≤FEV1 <80% predicted
• XS80 – GOLD 1 - mild: FEV1≥ 80% predicted
• XS8K – GOLD 3 - severe: 30% ≤FEV1 <50% predicted

Foundation entity

GOLD 4 - very severe: FEV1 <30% predicted – http://id.who.int/icd/entity/1080893150