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Any pain is based on responses of “some days,” “most days,” or “every day” to a question asking how often the respondent had pain in the past 3 months. Pain at specific locations is based on responses of “a little,” “a lot,” or “somewhere between a little and a lot” to a question asking how much pain they had at these locations: 1) back; 2) hips, knees, or feet; 3) hands, arms, or shoulders; 4) headache or migraine; 5) abdomen, genitals, or pelvis; and 6) tooth or jaw. Respondents could indicate pain at more than one location.