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. 2019 Oct 9;44(3):174–181. doi: 10.1080/01658107.2019.1656752
Result Sample Size Calculator
303/335 O&N NA + Europe (90.5% prefer TABx). Total estimated 1,983 O&N NA + Europe
95% CI is ±2.9%
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A total of 303 O&N in NA & Europe preferred TABx. 88.4% used TABx exclusively
95% CI is ±3.32%
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253 North American O&N/total 1743 O&N in North America with 95.58% choosing TABx
95% CI is ±2.31%
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82 European O&N/total 240 O&N in Europe with 74.39% choosing TABx
95% CI is ±7.7%
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24.39 ± 7.56% of op& neuro in Europe prefer US  
64/71 rheumatologists in survey (90.14% prefer TABx). There are 270 provincially registered rheum
95%CI is ± 6.0%
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