Table.

Anti-spike antibody responses 3 months after two doses of SARS-CoV-2 vaccine stratified by antibody responses 1 month after two-dose mRNA vaccine series in patients (n=809) with rheumatic and musculoskeletal diseases

	Negative antibody response at 3 months (n=56)	Low-positive antibody responses at 3 months (n=77)	High-positive antibody responses at 3 months (n=676)
Negative antibody response at 1 month (n=65)	50 (77%)	9 (14%)	6 (9%)
Low-positive antibody response at 1 month (n=75)	5 (7%)	37 (49%)	33 (44%)
High-positive antibody response at 1 month (n=669)	1 (<1%)	31 (5%)	637 (95%)

Data are n (%), where the denominator is the number of patients with responses at 1 month.