MBL2 and systemic lupus erythematosus: In comparison, our study evaluated a larger study population than the studies by ∅hlenschlaeger et al. 55, Jönsen et al. 58 and Font et al. 54 but slightly less patients than the study by Calvo et al. 57 Although in our study MBL deficiency was numerically more common in the group of SLE patients with CVD than in the Non-CVD group (40.3% vs. 33.4% below 500 ng/ml and 50.0% vs. 46.3% below 1000 ng/ml), this difference was not significant, which could be due to the relatively small number of events in total.