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Table 2 Interrupted time-series regression analysis of the MRSA/MSSA bacteremias (total and ≥48 h), MRSA/MSSA systemic (Hospital - % of admissions) and MRSA/MSSA systemic (Community – total numbers)

From: Impact of universal screening on MRSA bacteremias in a single acute NHS organisation (2006–12): interrupted time-series analysis

  Parameter Unstandardized Standardized t p 95% CI D-W
Coefficients - B (Std. Error) Coefficients - β
MRSA bacteremias Constant 17.40 (1.64)   10.59 .000 14.04 to 20.75 1.573
Pre-intervention trend -.025 (.181) -.033 -.138 .891 -.39 to .34
Post-intervention change −8.32 (2.072) -.554 −4.016 .000 −12.55 to −4.09
Post-intervention trend -.45 (.221) -.393 −2.065 .048 -.90 to -.005
MSSA bacteremias Constant 17.36 (2.45)   7.075 .000 12.35 to 22.37 2.068
Pre-intervention trend .29 (.270) .604 1.098 .281 -.255 to .848
Post-intervention change −2.28 (3.095) -.235 -.737 .467 −8.60 to 4.04
Post-intervention trend -.61 (.330) -.818 −1.858 .073 −1.28 to.06
MRSA ≥48 h bacteremias Constant 13.46 (1.38)   9.75 .000 10.64 to 16.28 1.753
Pre-intervention trend -.10 (.152) -.168 -.659 .515 -.41 to .21
Post-intervention change −6.79 (1.741) -.577 −3.901 .001 −10.34 to −3.23
Post-intervention trend -.19 (.185) -.216 −1.060 .298 -.57 to .18
MSSA ≥48 h bacteremias Constant 5.96 (1.84)   3.22 .003 2.16 to 9.76 1.901
Pre-intervention trend .173 (.272) .503 .634 .532 -.38 to .73
Post-intervention change 1.10 (2.112) .178 .521 .606 −3.24 to 5.44
Post-intervention trend -.45 (.298) -.990 −1.524 .140 −1.06 to .15
MRSA Systemic (Trust) Constant 5.8 (.225)   25.78 .000 5.34 to 6.26 1.599
Pre-intervention trend -.17 (.028) -.830 −6.252 .000 -.23 to -.11
Post-intervention change −2.03 (.271) -.506 −7.493 .000 −2.58 to −1.47
Post-intervention trend .10 (.033) .350 3.269 .003 .040 to 17
MSSA Systemic (Trust) Constant 3.25 (.191)   17.01 .000 2.86 to 3.64 1.421
Pre-intervention trend -.05 (.024) -.892 −2.358 .026 -.10 to -.007
Post-intervention change .29 (.230) .248 1.289 .208 -.17 to .76
Post-intervention trend .134 (.028) 1.477 4.846 .000 .07 to .19
MRSA Systemic (GP) Constant 287 (12.35)   23.25 .000 262 to 313 1.962
Pre-intervention trend −2.49 (1.55) -.285 −1.602 .120 −5.68 to .69
Post-intervention change −66.23 (14.89) -.402 −4.447 .000 −96.73 to −35.72
Post-intervention trend −4.22 (1.78) -.338 −2.362 .025 −7.88 to -.56
MSSA Systemic (GP) Constant 906 (31.57)   28.71 .000 841 to 971 2.427
Pre-intervention trend −7.52 (3.97) −1.27 −1.891 .069 −15.67 to .62
Post-intervention change 11.71 (38.04) .105 .308 .760 −66.22 to 89.65
Post-intervention trend 10.16 (4.56) 1.20 2.224 .034 .80 to 19.51