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. 2018 May 30;2:14. doi: 10.1186/s41927-018-0020-0

Table 1.

Demographics and Patient Characteristics (N = 382,221)a

Characteristic No. (%) of Patient Visitsb
Observation Period
 2009–2011 588,791,594 (61)
 2007–2008 375,839,802 (39)
Age (years)
 Mean (SE) 53.9 (0.23)
Age Group
 ≥65 299,032,423 (31)
 45–64 351,209,142 (36)
 20–44 314,389,831 (33)
Sex
 Female 587,394,025 (61)
 Male 377,237,371 (39)
Race
 Other 33,516,436 (5)
 African-American 99,604,070 (14)
 Caucasian 602,374,076 (82)
Ethnicity
 Hispanic/Latino 79,262,491 (11)
 Non-Hispanic/Latino 630,345,157 (89)
Region
 Northeast 189,690,837 (20)
 Midwest 206,775,296 (21)
 West 201,670,759 (21)
 South 366,494,504 (38)
MSA
 Non-MSA 120,846,147 (13)
 MSA 843,785,249 (87)
Insurance Status
 Other 98,736,670 (11)
 Medicaid 88,374,398 (10)
 Medicare 280,902,288 (30)
 Private Insurance 461,730,141 (49)
Setting Type
 Hospital Emergency 94,712,528 (10)
 Hospital Outpatient 78,137,131 (8)
 Physician’s Office 791,781,738 (82)
Diuretic Use
 Yes 71,243,249 (7)
 No 893,388,147 (93)
Gout
 Yes 11,769,697 (1)
 No 952,861,700 (99)

MSA Metropolitan Statistical Area

aUnweighted, raw study sample size

bSurvey weighting and clusters accounted for reflecting unbiased, national annual estimates of visit occurrences for the portion of the population meeting the study inclusion/exclusion criteria