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Table 3 Sensitivity analysis results

From: Cost-effectiveness of interventions for increasing the possession of functioning smoke alarms in households with pre-school children: a modelling study

Intervention* Expected QALYs Expected costs (£s) Incremental QALYs Incremental costs (£s) ICER (£s) Probability CE (£30,000) Probability CE (£50,000)
SA1: prevalence of smoke alarms in households of 50%
(1) UC 25,056.054 20,813 ---- ---- ---- 0.987 0.984
(25038.86 to 25073.69) (8337 to 43726)
(2) E 25,056.070 23,732 0.016 2,919 180,400 0.000 0.000
(25038.88 to 25073.71) (11327 to 46646)
(3) E + FE 25,056.079 25,715 0.009 1,983 225,545 0.013 0.015
(25038.88 to 25073.72) (13029 to 48245)
(7) E + FE + F + HI 25,056.081 37,863 0.002 12,148 5,955,269 0.000 0.000
(25038.89 to 25073.72) (18872 to 61155)
SA2: probability of accepting the intervention of 50%
(1) UC 25,056.159 19,470 ---- ---- ---- 0.238 0.086
(25038.67 to 25074.24) (7948 to 40486)
(3) E + FE 25,056.177 19,695 0.018 225 12,701 0.762 0.914
(25038.69 to 25074.26) (8618 to 39932)
(7) E + FE + F + HI 25,056.177 21,656 0.000 1,961 3,502,138 0.000 0.000
(25038.7 to 25074.26) (10383 to 42046)
SA3: null decay of safety equipment
(1) UC 25,056.404 18,839 ---- ---- ---- 0.960 0.817
(25039.07 to 25073.81) (7684 to 39507)
(2) E 25,056.413 19,530 0.009 691 80,117 0.038 0.171
(25039.08 to 25073.82) (8558 to 39944)
(3) E + FE 25,056.416 20,094 0.003 564 209,061 0.001 0.012
(25039.09 to 25073.81) (9193 to 40546)
(7) E + FE + F + HI 25,056.417 23,596 0.001 3,502 3,466,635 0.000 0.000
(25039.09 to 25073.82) (12021 to 44319)
SA4: considering 1.8 children per household
(1) UC 44,349.503 32,867 ---- ---- ---- 0.114 0.029
(44318.77 to 44380.1) (12272 to 71150)
(3) E + FE 44,349.544 33,050 0.041 183 4,456 0.885 0.968
(44318.82 to 44380.14) (13428 to 69595)
(7) E + FE + F + HI 44,349.546 36,531 0.002 3,481 1,923,416 0.000 0.000
(44318.83 to 44380.14) (16836 to 73296)
SA5: same probability of injury for households with functioning and non-functioning smoke alarms
(1) UC 25,056.511 15,279 ---- ---- ---- 0.960 0.943
(25039.23 to 25073.87) (6611 to 31524)
(3) E + FE 25,056.519 16,562 0.008 1,283 154,513 0.040 0.057
(25039.24 to 25073.88) (7924 to 32584))
(7) E + FE + F + HI 25,056.520 20,080 0.001 3,518 9,772,579 0.000 0.000
(25039.23 to 25073.88) (10842 to 35798)
  1. Data are expected QALY (95% credibility interval) and expected costs (95% credibility interval) per 1,000 households. (1) UC = usual care; (2) E = education; (3) E + FE = education plus low cost/free safety equipment; (4) E + FE + HI = education plus low cost/free safety equipment plus home inspection; (5) E + FE + F = education plus low cost/free safety equipment plus fitting; (6) E + HI = education plus home inspection; (7) E + FE + F + HI = education plus low cost/free safety equipment plus fitting plus home inspection. Probability CE = probability that intervention is cost effective at a £30,000/£50,000 threshold value. QALYs = quality-adjusted life years.
  2. *Showing only interventions that were not dominated or extendedly dominated.