TABLE VI. Frequency of risk factors related to hepatitis B virus (HBV) infection in HBV-infected Mexican children with hepatitis from 2005-2009.
| Risk factors | HBV-positivea (n = 24) | HBV-negativeb (n = 191) | HBV-positive vs. HBV-negative | ||
|---|---|---|---|---|---|
|
| |||||
| n (%) | n (%) | OR | 95% CI | pc | |
| Hospitalisations | 11 (46) | 83 (43) | 1.10 | 0.47-2.58 | 0.825 |
| Surgery | 5 (21) | 25 (13) | 1.74 | 0.60-5.10 | 0.302 |
| Tattoos | 1 (4) | 3 (1) | 2.72 | 0.27-27.29 | 0.379 |
| Blood transfusion | 1 (4) | 6 (3) | 1.34 | 0.15-11.63 | 0.569 |
| Sex with a sex worker | 1 (4) | 2 (2) | 4.11 | 0.36-47.10 | 0.300 |
| Promiscuity | 1 (4) | 3 (2) | 2.74 | 0.27-27.29 | 0.379 |
| Acupuncture | 1 (4) | 1 (0.5) | 8.26 | 0.50-136.59 | 0.211 |
| Injection with contaminated needles | 1 (4) | 1 (0.5) | 8.26 | 0.50-136.59 | 0.211 |
| Hepatitis B non-vaccinated | 15 (62) | 123 (64) | 0.92 | 0.38-2.22 | 0.855 |
| History of HBV infection in children’s parents | 4 (17) | 12 (6) | 2.98 | 0.88-10.13 | 0.087 |
a: positive for HBV DNA by two sets of primers within the HBV genome; b: negative for HBV DNA by two sets of primers within the HBV genome; c: by chi-square test or Fisher’s exact test; CI: confidence interval; OR: odds ratio.