PMC1257651_01
The patient's morning and evening PEFRs recorded in 1997 on 11 consecutive days while at work (Sunday, 2 November, through Wednesday, 12 November) and on 6 consecutive days while on vacation (Wednesday, 13 November, through Tuesday, 18 November).
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His peak expiratory flow rate (PEFR) diary during an 11-day work period and a subsequent 6-day vacation period showed significant improvement (20% in the morning, 22% in the evening) while he was away from work (Table 3) and progressive improvement during successive days of vacation (Figure 1).