Table 1.
Demographic Characteristics of Analysis Population by Headache Status (NHANES 1999–2004)
| Headache YES | Headache NO | |||
|---|---|---|---|---|
| N | %† | N | %† | |
| Adult respondents with reliable interview data | 2742 | 10,682 | ||
| All relevant data‡ non‐missing | 2687 | 98.1 | 10,346 | 97.6 |
| Did not take analgesic medication§ | 1636 | 58.2 | 7183 | 68.8 |
| Female# | 1100 | 63.4 | 3451 | 46.2 |
| Age <50 years# | 1250 | 80.6 | 4345 | 67.6 |
| BMI < sex‐specific median# | 754 | 48.7 | 3654 | 53.8 |
†Based on weighted frequencies.
‡Dietary sodium, total caloric intake, analgesic use, age, sex, BMI.
§Denominator for percentage = respondents with all relevant data non‐missing.
#Denominator for percentage = respondents with all relevant data non‐missing who did not take analgesics.