Asthma control according to Global Initiative for Asthma
| Characteristic | Controlled | Partly controlled | Uncontrolled |
| Daytime symptoms | None (twice or less per week) | More than twice per week | Three or more features of partly controlled asthma present in any week |
| Limitations of activities | None | Any | Three or more features of partly controlled asthma present in any week |
| Nocturnal symptoms/awakening | None | Any | Three or more features of partly controlled asthma present in any week |
| Need for reliever/rescue treatment | None (twice or less per week) | More than twice per week | Three or more features of partly controlled asthma present in any week |
| Lung function (PEF or FEV1)# | Normal | <80% pred or personal best (if known) | Three or more features of partly controlled asthma present in any week |
| Exacerbations | None | One or more per year¶ | One in any week+ |
PEF: peak expiratory flow; FEV1: forced expiratory flow in one second; % pred: % predicted. #: not a reliable test for children 5 yrs of age and younger; ¶: any exacerbation should prompt review of maintenance treatment to ensure it is adequate; +: an exacerbation in any week makes that an uncontrolled asthma week. Reproduced from 1 with permission from the publisher.