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Table 7 95%CI intervals for 4, 5 and 6 baseline question models when n = 100, 200, 300, 400, 500, 750, 1500 and 2000

From: New non-randomised model to assess the prevalence of discriminating behaviour: a pilot study on mephedrone

Sample size 4 baseline questions B(4*k, 05) 5 baseline questions B(5*k, 05) 6 baseline questions B(6*k, 05)
  Lower Upper Lower Upper Lower Upper
100 1.800 2.200 2.280 2.720 2.760 3.240
200 1.860 2.140 2.345 2.655 2.830 3.170
300 1.887 2.113 2.373 2.627 2.860 3.140
400 1.903 2.098 2.390 2.610 2.880 3.120
500 1.912 2.088 2.402 2.598 2.892 3.108
750 1.928 2.072 2.420 2.580 2.912 3.088
1000 1.938 2.062 2.431 2.569 2.924 3.076
1500 1.949 2.051 2.443 2.557 2.938 3.062
2000 1.956 2.044 2.451 2.549 2.947 3.054