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Relation of Family Income to Annual Incidence of Respiratory Illness
| Income Range∗(US $) | No. in Group | Mean Annual No. of Respiratory Illnesses per Person |
|
|---|---|---|---|
| Unadjusted | Age-Adjusted | ||
| <5,000 | 185 | 3.8 | 3.8 |
| 5,000–6,999 | 603 | 3.4 | 3.1 |
| 7,000–9,999 | 1,504 | 3.2 | 3.0 |
| 10,000–14,999 | 969 | 2.8 | 2.9 |
| >15,000 | 371 | 2.7 | 3.0 |
Adapted from JAMA.7
Income data from 1974.
