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Table 7 Fall-specific characteristics for total events, number of subjects at risk, total follow-up in days, and crude rate ratios, as indicated by the marginal and conditional total time models

From: On reporting results from randomized controlled trials with recurrent events

Conditional model
  Control Intervention  
Event # events # at risk follow-up rate* # events # at risk follow-up rate* crude RR
fall 1 228 250 34,355 6.64 202 250 44,726 4.52 0.68
fall 2 180 228 24,361 7.39 104 202 30,264 3.44 0.47
fall 3 122 180 14,641 8.33 45 104 10,500 4.29 0.51
fall 4 77 122 9,673 7.96 18 55 4,301 4.19 0.53
Marginal model
  Control Intervention  
Event # events # at risk follow-up rate* # events # at risk follow-up rate* crude RR
fall 1 228 250 34,355 6.64 202 250 44,726 4.52 0.68
fall 2 180 250 58,716 3.07 104 250 74,990 1.39 0.45
fall 3 122 250 73,357 1.66 45 250 85,490 0.53 0.32
fall 4 77 250 83,030 0.93 18 250 89,791 0.20 0.22
  1. * fall rate measured per 1000 person-days
  2. RR = rate ratio