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. 2016 Jan 19;11(1):e0147116. doi: 10.1371/journal.pone.0147116

Table 1. Demographic Characteristics.

Participants 2+ Visits 3+ Visits 4+ Visits 5+ Visits
Characteristic (n = 1443) (n = 1019) (n = 697) (n = 366) (n = 216)
Age, y, mean (SD) 34.4 (13.4) 34.0 (13.4) 34.1 (13.3) 34.1 (13.3) 33.8 (13.3)
Age, y, no. (%)
<21 190 (13.2) 138 (13.5) 96 (13.8) 50 (13.7) 33 (15.3)
21–30 528 (36.6) 381 (37.4) 255 (36.6) 133 (36.3) 77 (35.6)
31–40 258 (17.9) 177 (17.4) 124 (17.8) 70 (19.1) 36 (16.7)
41–50 265 (18.4) 185 (18.2) 127 (18.2) 61 (16.7) 37 (17.1)
51–60 140 (9.7) 97 (9.5) 68 (9.8) 38 (10.4) 27 (12.5)
>60 62 (4.3) 41 (4.0) 27 (3.9) 14 (3.8) 6 (2.8)
Gender, no. (%)
Female 901 (62.4) 674 (66.1)** 468 (67.1)* 258 (70.5)*** 151 (69.9)**
Male 342 (37.6) 345 (33.9) 229 (32.9) 108 (29.5) 65 (30.1)
Race/Ethnicity, no. (%)
African American 1082 (75.0) 803 (78.8)*** 563 (80.8)*** 288 (78.7) 172 (79.6)
White 319 (22.1) 200 (19.6) 123 (17.6) 71 (19.4) 40 (18.5)
Hispanic/Latino 19 (1.3) 10 (1.0) 6 (0.9) 3 (0.8) 0.0 (0.0)
Asian/Pac Islander 14 (1.0) 3 (0.3) 2 (0.3) 1 (0.3) 3 (0.5)
Other 9 (0.6) 3 (0.3) 3 (0.4) 3 (0.8) 3 (1.4)

Note. Description of above variables presented in text.

Sig.:

*P = .05

**P = .01

***P = .001