Brief Articles
Copyright ©2009 The WJG Press and Baishideng.
World J Gastroenterol. Apr 7, 2009; 15(13): 1607-1612
Published online Apr 7, 2009. doi: 10.3748/wjg.15.1607
Table 1 Hepatitis C virus seroprevalence (1000-1× year-1) among male volunteer blood donors at four large blood banks in Karachi (1998- 2005)
YrMeanSD95% CI for mean
MinimumMaximum
Lower limitUpper limit
199813.81.512.814.71216
199916.32.214.817.71321
200018.52.217.119.91522
200119.82.018.621.11622
200219.93.018.021.81526
200320.33.218.222.31627
200429.32.627.630.92533
200524.82.123.426.12127
Total20.35.119.321.31233
Table 2 Autoregressive integrated moving average model (2,1,7) of hepatitis C virus seroprevalence (1000-1× month-1) among male volunteer donors in Karachi, Pakistan, (January 1998-December 2005)
ParametersEstimateStandard errort-ratio
Autoregressive parameter (Φ)
Φ20.670.154.5
Moving average parameter (θ)
θ2-0.590.183.3
θ30.490.153.3
θ4-0.800.117.3
θ60.740.213.5
θ7-0.370.172.2