Research Article

Comparisons of Costs between Black Caribbean and White British Patients with Advanced Multiple Sclerosis in the UK

Table 4

Bootstrap regression with additional potential predictor variables.

Variable Reps. Observed BiasStd. err.(95% conf. interval)

Time with disease yrs1000−542.0193−7.667818344.3306−1217.714133.675(N)
−1236.73124.6862(P)
−1243.697117.6147(BC)

EDSS scores 1000 5985.08151.634162951.37193.484411776.68(N)
396.771411991.88(P)
299.250211978.44(BC)

IMD scores 1000.5103984 .0567446.8758165−1.2082522.229049(N)
−1.0524152.274935(P)
−1.1369452.226263(BC)

Gender1000148.7712−335.90378453.865−16440.616738.14(N)
−16866.3215346.41(P)
−16887.9915305.67(BC)

Ethnicity1000−804.5152−6.846454705.3772−2188.706579.6757(N)
−2183.026556.8843(P)
−2177.213559.2528(BC)

Type of MS10001714.387191.98865750.809−9570.66412999.44(N)
−9150.4213923.62(P)
−9373.64613810.63(BC)

Age at interview1000−392.8838−2.470308369.3031−1117.583331.8151(N)
−1158.42331.5103(P)
−1165.851314.4072(BC)

Constant100020394.31−227.121526323.28−31260.9572049.57(N)
−31201.8175481.04(P)
−26689.3778229.74(BC)

Note: N = normal.
P = percentile.
BC = bias corrected.
Bootstrap statistics: number of obs. = 86, replications = 1000.