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Demographic profile of patients who returned questionnaires (N = 310)
| Age (median) | 36 yr |
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| Sex | 74.2% women |
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| Education (median) | 16 yr |
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| Annual income (median) | $20,000 to $40,000 |
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| Marital status | |
| Married | 48.1% |
| Single | 36.5% |
| Divorced/widowed | 15.5% |
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| Race | 93.5% white |
