Table 1. Characteristics of the multicenter, prospective human T-lymphotropic virus (HTLV) cohort study populationa.
| Characteristics | HTLV-I (n = 152) | HTLV-II (n = 387) | HTLV negative (n = 799) |
|---|---|---|---|
| Age (y) | No. (%) | No. (%) | No. (%) |
| 18–29 | 5 (3) | 11 (3) | 34 (4) |
| 30–39 | 28 (18) | 104 (27) | 171 (21) |
| 40–49 | 55 (36) | 168 (43) | 288 (36) |
| 50–59 | 32 (21) | 73 (19) | 175 (22) |
| >60 | 32 (21) | 31 (8) | 131 (16) |
| Sex | |||
| Male | 43 (28) | 102 (26) | 257 (32) |
| Female | 109 (72) | 285 (74) | 542 (68) |
| Race/ethnicity | |||
| Asian | 20 (13) | 8 (2) | 60 (8) |
| Black | 61 (40) | 125 (32) | 248 (31) |
| Hispanic | 9 (6) | 104 (27) | 150 (19) |
| Other | 1 (1) | 7 (2) | 30 (4) |
| White | 59 (39) | 140 (36) | 309 (39) |
| Unknown | 2 (1) | 3 (1) | 2 (0) |
| Education | |||
| High school or less | 45 (30) | 135 (35) | 129 (16) |
| Some college | 66 (43) | 195 (51) | 363 (46) |
| College | 30 (20) | 45 (12) | 181 (23) |
| College (>4 years) | 11 (7) | 11 (3) | 123 (15) |
| Income | |||
| <$30,000 | 46 (30) | 144 (38) | 167 (21) |
| $30,000–49,999 | 51 (34) | 120 (32) | 221 (28) |
| >$50,000 | 55 (36) | 113 (30) | 401 (51) |
| Center | |||
| 1 | 32 (21) | 51 (13) | 122 (15) |
| 2 | 29 (19) | 39 (10) | 102 (13) |
| 3 | 44 (29) | 206 (53) | 345 (43) |
| 4 | 31 (20) | 68 (18) | 156 (20) |
| 5 | 16 (11) | 23 (6) | 74 (9) |
| Blood donor type | |||
| Autologous | 28 (18) | 39 (10) | 111 (14) |
| Allogeneic | 124 (82) | 348 (90) | 688 (86) |
| Smoking history (pack/y) | |||
| Nonsmoker | 74 (52) | 125 (36) | 413 (54) |
| 0–13 | 24 (17) | 117 (33) | 184 (24) |
| >13 | 43 (31) | 109 (31) | 174 (23) |
| Alcohol intake (average drinks per wk) | |||
| Nondrinker | 19 (13) | 20 (6) | 70 (9) |
| 0–1 | 58 (41) | 134 (38) | 352 (46) |
| >1 | 64 (45) | 200 (57) | 339 (45) |
| Lifetime sex partners | |||
| <6 | 56 (38) | 87 (23) | 381 (49) |
| >6 | 92 (62) | 292 (77) | 403 (51) |
| Injection drug use | |||
| Ever | 148 (98) | 294 (76) | 787 (99) |
| Ex-injection drug user | 2 (1) | 75 (19) | 9 (1) |
| Current injection drug user | 1 (1) | 17 (4) | 1 (0) |
aMissing data (up to 6%, depending upon the variable) were excluded from the calculation of percentages.