Seasonal distribution of immune-related adverse event (IRAE) occurrence
| Before propensity score matching | After propensity score matching# | |||||||||
| n | FV-positive (n=67) | FV-negative (n=55) | Combined (n=122) | p-value | n | FV-positive (n=50) | FV-negative (n=55) | Combined (n=105) | p-value | |
| Season of IRAEs | 122 | 0.620 | 105 | 0.464 | ||||||
| Spring | 15 (22) | 9 (16) | 24 (20) | 12 (24) | 9 (16) | 21 (20) | ||||
| Summer | 17 (25) | 16 (29) | 33 (27) | 15 (30) | 16 (29) | 31 (30) | ||||
| Fall | 12 (18) | 14 (25) | 26 (21) | 7 (14) | 14 (25) | 21 (20) | ||||
| Winter | 23 (35) | 16 (30) | 39 (32) | 16 (32) | 16 (30) | 32 (30) | ||||
| Influenza season of IRAEs | 122 | 0.799 | 105 | 0.382 | ||||||
| Fall/winter | 35 (52) | 30 (55) | 65 (53) | 23 (46) | 30 (55) | 53 (50) | ||||
| Spring/ summer | 32 (48) | 25 (45) | 57 (47) | 27 (54) | 25 (45) | 52 (50) | ||||
Data are presented as n (%), unless otherwise stated. FV: influenza vaccination. #: one of the five propensity score matching models run after multiple imputations (the numbers varied very slightly among the five runs).