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Published online 2020 Mar 11. doi: 10.1186/s12882-020-01750-8

Table 2

Estimated number needed to treat according to Trimethoprim/sulfamethoxazole prophylaxis duration

12-months prophylaxis6-months prophylaxis
Rituximab group
 PCP events220
 Non-PCP events520502
 Total subjects522522
 PCP incidence0.0038 (0.38%)0.0383 (3.83%)
 Absolute risk reduction3.45%
 Relative risk reduction90.0%
 Number needed to treat29.0
Non-rituximab group
 PCP events618
 Non-PCP events15821570
 Total subjects15881588
 PCP incidence0.0038 (0.38%)0.0113 (1.13%)
 Absolute risk reduction0.75%
 Relative risk reduction66.4%
 Number needed to treat133.3

PCP pneumocystis carinii pneumonia

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