Table 2.
Neutralizing antibody titersa among SV40-seropositive women by ethnic group, year of birth, and pregnancy status
| Characteristic | Cohort A | Cohort B | Cohort C | |||
|---|---|---|---|---|---|---|
|
| ||||||
| African-American | Caucasian | Caucasian | African-American | Caucasian | Hispanic | |
| Total seropositive for SV40 | 13 | 2 | 37 | 11 | 5 | 23 |
|
| ||||||
| No. born before 1963 | 13 | 2 | 37 | 4 | 4 | 7 |
| Mean ± sd SV40 antibody titer (range)b,c | 5.65 ± 1.71 (3.32–8.96) | 7.80 ± 1.64 (6.64–8.96) | 5.83 ± 2.06 (4.32–11.32) | 4.57 ± 0.50 (4.32–5.32) | 6.57 ± 2.87 (4.32–10.32) | 4.75 ± 0.97 (3.32–5.32) |
|
| ||||||
| No. born 1963 or later | NA | NA | NA | 7 | 1 | 16 |
| Mean ± sd SV40 antibody titer (range)b,c | NA | NA | NA | 4.89 ± 1.71 (3.32–7.32) | 5.32 | 4.77 ± 1.87 (3.32–7.64) |
|
| ||||||
| No. pregnant | 9 | 1 | NA | NA | NA | NA |
| Mean ± sd SV40 antibody titer (range)d | 5.43 ± 1.53 (3.32–8.32) | 6.64 | NA | NA | NA | NA |
|
| ||||||
| No. not pregnant | 4 | 1 | NA | NA | NA | NA |
| Mean ± sd SV40 antibody titer (range)d | 5.07 ± 1.70 (3.32–7.32) | 8.96 | NA | NA | NA | NA |
sd, standard deviation; NA, not applicable.
a
Neutralizing antibody titers, log2 transformed.
b
Comparison of SV40 antibody titers by ethnicity in cohort A (p = 0.06) and in cohort C (p = 0.22).
c
Comparison of SV40 antibody titers by year of birth (before 1963 vs. 1963 or later) in cohort C (p = 0.80).
d
Comparison of SV40 antibody titers by pregnancy status (pregnant vs. nonpregnant) in cohort A (p = 0.95).