Volume 19, Number 1—January 2013
Research
Risk Factors for Nipah Virus Infection among Pteropid Bats, Peninsular Malaysia
Table 6
Risk factors for Nipah virus seropositivity (without pup data) in Pteropus hypomelanus bats sampled in Pulau Tioman, Peninsular Malaysia, January 2004–October 2006*
| Variable | β | SE | p value | OR (95% CI) |
|---|---|---|---|---|
| Time | ||||
|
Jan 2004 |
Referent | Referent | Referent | 1.00 |
|
Apr 2004 |
−0.58 | 0.57 | 0.310 | 0.55 (0.17–1.72) |
|
Jul 2004 |
0.52 | 0.59 | 0.373 | 1.69 (0.53–5.43) |
|
Sep 2004 |
0.38 | 0.51 | 0.457 | 1.46 (0.53–3.97) |
|
Feb 2005 |
−1.31 | 0.62 | 0.034 | 0.26 (0.07–0.90) |
|
Apr 2005 |
−1.17 | 0.78 | 0.135 | 0.30 (0.06–1.44) |
|
Jun 2005 |
−0.44 | 0.59 | 0.459 | 0.64 (0.19–2.07) |
|
Sep 2005 |
−1.54 | 0.76 | 0.045 | 0.21 (0.04–0.96) |
|
Feb and Mar 2006† |
−2.59 | 1.09 | 0.018 | 0.07 (0.00–0.63) |
|
May 2006 |
−2.13 | 1.09 | 0.051 | 0.11 (0.01–1.00) |
|
Jul 2006 |
−0.32 | 0.56 | 0.564 | 0.72 (0.24–2.17) |
|
Oct 2006 |
−2.47
|
1.08
|
0.022
|
0.08 (0.01–0.70)
|
| Sexual and reproductive maturity | ||||
|
Adult males |
Referent | Referent | Referent | 1.00 |
|
Juvenile males |
−0.78 | 0.52 | 0.132 | 0.45 (0.16–1.27) |
|
Dry females |
−0.84 | 0.53 | 0.114 | 0.42 (0.14–1.22) |
|
Pregnant females |
0.50 | 0.62 | 0.421 | 1.65 (0.48–5.61) |
|
Carrying a female pup |
1.24 | 0.69 | 0.074 | 3.48 (0.88−13.6) |
|
Nursing females |
0.50 | 0.63 | 0.427 | 1.65 (0.47–5.74) |
|
Juvenile females |
−2.34 | 0.70 | 0.001 | 0.09 (0.02–0.38) |
*β, estimated coefficient; OR, odds ratio.
†Data were combined to enable analysis.
1Members of the Henipavirus Ecology Research Group are listed on the group’s website (www.ecohealthalliance.org/herg).


