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. 2023 Jul 25;77(Suppl 2):S199–S205. doi: 10.1093/cid/ciad324

Table 2.

Summary Outcomes: Antibiotic Prescriptions by Country and Overall

Country Patients With ATBs Prescribed/Total in Group, No. (%) Effect
Intervention Group Control Group Relative: Risk Ratio (RR)
(95% CI)
Absolute: Risk Difference (RD)
(95% CI)
No. Needed to Testa
Burkina Faso 343/844 (40.6) 481/837 (57.5) 29% Reduction
(−22% to −36%)
17 Fewer ATB Rx per 100 patients tested
(12–22 fewer)
1 Fewer ATB Rx for every 6 patients tested (range: 8 to 5 patients)
Ghana 294/760 (38.7) 323/745 (43.4) 11% Reduction
(−21% to 1%)
5 Fewer ATB Rx per 100 patients tested
(0–10 fewer)
1 Fewer ATB Rx for every 21 patients tested (range: from 1 fewer for every 10 patients, to 1 more for every 340 patients)
Uganda 396/703
(56.3)
366/782
(46.8)
20% Increase
(9%–33%)
10 More ATB Rx per 100 patients tested
(4–15 more)
1 More ATB Rx for every 10 patients tested (range: 25 to 7 patients)
All countries 1033/2307
(44.8)
1170/2364
(49.5)
9% Reduction
(−3% to −15%)
5 Fewer ATB Rx per 100 patients tested
(2–7 fewer)
1 Fewer ATB Rx for every 20 patients tested (range: 50 to 14 patients)

Abbreviations: ATB, antibiotic; CI, confidence interval; RD, risk difference; RR, risk ratio; Rx, prescription(s).

Number needed to test to prevent 1 more ATB Rx if results were negative (or lead to 1 more if they were positive).