ABSTRACT
Population follow-up Asymptomatic Chronic/ from (Ref.) years or improved Mild severe asthma 688 with onset of asthma before 20 66 14 17 1.5
age 13 years from a private office (15)
236 less than 14 years seen at 5 44 36 20 1.0 pediatric allergy clinic (70)
l 000 referred to author for care ll 48 26 19 7 after 1935 (71)
518 treated at a private office lO 41 52 6 before 1956 (18)
244 under 12 years of age seen 20 27 49 21 1948-1952 in a group practice (16)
314 age 7 years old sampled 7 48 52 from public schools beginning in 1964 (6)
25 ages 7-17 years from a 7 72 28 general population sample beginning in 1972 (22)
Source: Table 7 in Ref. I.
