TABLE 2.
INTENSITY OF PRESENTING AIRFLOW OBSTRUCTION
| AA
|
C
|
||||
|---|---|---|---|---|---|
| Population | No. | PEFR, % predicted (absolute) | No. | PEFR, % predicted (absolute) | p Value |
| All subjects | 155 | 34.1 ± 1.4 (175 ± 8) | 140 | 40.8 ± 1.7 (203 ± 8) | 0.002 |
| Subgroups | |||||
| Mild | 26 | 60.06 ± 2.3 (312 ± 15) | 47 | 61.1 ± 1.4 (297 ± 8) | 0.68 |
| Severe | 129 | 28.7 ± 1.2 (147 ± 6) | 93 | 30.3 ± 15 (156 ± 8) | 0.41 |
| Life-threatening | 88 | 22.6 ± 1.2 (117 ± 6) | 57 | 22.1 ± 1.6 (115 ± 8) | 0.76 |
Definition of abbreviations: AA = African Americans; C = whites; PEFR = peak expiratory flow rates as a percentage of predicted.
The data are mean values ± SEM; the data in parentheses are the absolute values in L/min. Mild = acute episodes with an initial PEFR ⩾ 50% of predicted, severe = an initial PEFR value ⩽ 50% of predicted, life-threatening = an initial PEFR value ⩽ 35% of predicted.