Volume 21, Number 2—February 2015
Research
Naturally Acquired Antibodies against Haemophilus influenzae Type a in Aboriginal Adults, Canada
Eli B. Nix, Kylie Williams, Andrew D. Cox, Frank St. Michael, Sandra Romero-Steiner, Daniel S. Schmidt, William G. McCready, and Marina Ulanova
Table 1
Demographic characteristics of Aboriginal and non-Aboriginal groups studied for antibodies against Haemophilus influenzae type a, Thunder Bay region, northwestern Ontario, Canada, 2010–2012*
| Group | No. | Age, y |
No. (%) female | No. (%) ≥60 y | |||
|---|---|---|---|---|---|---|---|
| Mean | Median | SD | Range | ||||
| Aboriginal CRF patients | 30 | 54 | 54 | ±13.4 | 29–78 | 21 (70) | 10 (33) |
| Aboriginal healthy comparison group | 30 | 49.1 | 47 | ±9.4 | 39–75 | 25 (83) | 4 (13) |
| Non-Aboriginal CRF patients | 30 | 60.3 | 64.5 | ±13.9 | 26–79 | 11 (37) | 20 (67) |
| Non-Aboriginal healthy comparison group | 30 | 58.7 | 56 | ±9.4 | 45–80 | 18 (60) | 11 (37) |
| Healthy Aboriginal adults | 70 | 37.1 | 33.5 | ±12.7 | 19–75 | 58 (83) | 4 (6) |
| Healthy non-Aboriginal adults | 70 | 41.3 | 43 | ±14.1 | 22–68 | 44 (63) | 7 (10) |
*CRF, chronic renal failure. No significant age difference between healthy Aboriginal and non-Aboriginal adults (p = 0.067), Aboriginal and non-Aboriginal CRF patients (p = 0.081), Aboriginal CRF patients and Aboriginal healthy comparison group (p = 0.11), non-Aboriginal CRF patients and non-Aboriginal healthy comparison group (p = 0.60), p<0.05 between Aboriginal and non-Aboriginal healthy comparison groups (p = 0.0002). Healthy comparison groups (n = 30) were drawn from the large group of healthy adults (n = 70).
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