Table 3 Venous thromboembolic event... | American Society of Hematology

Table 3

Venous thromboembolic event rates in IVIg user and nonuser groups over 1 year of follow-up

IVIg exposure	Person-years	Event rate per 100 person-years	HR ratio* (95% CI)
Nonusers (n = 8035)	3343.6	1.17	1.00 (ref)
IVIg new users (n = 2724) by recency of IVIg exposure
Days 0-30	875.6	1.48	1.27 (0.67, 2.41)
Days 00-15	496.6	1.41	1.18 (0.51, 2.75)
Days 16-30	378.9	1.58	1.39 (0.57, 3.40)
Days 31-90	390.2	2.82	2.46 (1.25, 4.82)
Indeterminate	13.2	7.55	†

IVIg exposure	Person-years	Event rate per 100 person-years	HR ratio* (95% CI)
Nonusers (n = 8035)	3343.6	1.17	1.00 (ref)
IVIg new users (n = 2724) by recency of IVIg exposure
Days 0-30	875.6	1.48	1.27 (0.67, 2.41)
Days 00-15	496.6	1.41	1.18 (0.51, 2.75)
Days 16-30	378.9	1.58	1.39 (0.57, 3.40)
Days 31-90	390.2	2.82	2.46 (1.25, 4.82)
Indeterminate	13.2	7.55	†

Estimated HRs were obtained from Cox regression, as described in the Methods section.

HR for indeterminate exposure category not estimated due to sparse data.