For a child with asthma, which of the following factors is an indicator of poor control?

Awakening at night with asthma symptoms would most likely be an indicator of poor control because it indicates that the child's asthma is disrupting their sleep and causing them to wake up with symptoms. The other options may not necessarily be indicative of poor control. The number of colds experienced each year could be unrelated to asthma control and the need for salbutamol prior to exercise could depend on various factors. Keeping one canister of salbutamol at home and one at school could be a responsible approach to managing asthma, so it may not necessarily indicate poor control.