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British Guideline on the MAnAGeMent of AsthMA<br />

16<br />

Figure 2: Presentation with suspected asthma in adults<br />

HIGH PROBABILITY:<br />

diagnosis of asthma<br />

likely<br />

Continue<br />

treatment<br />

Trial of<br />

treatment*<br />

Presentation with suspected asthma<br />

Clinical assessment including spirometry<br />

(or PEF if spirometry not available)<br />

FEV 1 / FVC<br />

0.7<br />

Further investigation.<br />

Consider referral<br />

LOW PROBABILITY:<br />

other diagnosis likely<br />

Investigate/<br />

treat other<br />

condition<br />

Response? � Response?<br />

Yes No No Yes<br />

Continue<br />

treatment<br />

* See section 2.5.1<br />

� See Table 6

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