Skip to main content

Table 3 Characterisation of complement levels (n = 1140)

From: The association of low complement with disease activity in systemic sclerosis: a prospective cohort study

Parameter n (%) or mean ± SD or median (25th–75th IQR)
Hypocomplementaemiaa
 At recruitment 150 (13.2 %)
 Everb 275 (24.1 %)
Number of complement measurements per patient 2 (1–3)
 1 400 (35.1 %)
 2 265 (23.3 %)
 3 196 (17.2 %)
 4 129 (11.3 %)
 5 85 (7.5 %)
 6 50 (4.4 %)
 7 14 (1.2 %)
 8 1 (0.1 %)
Total number of complement measurements in data set 1893
Time interval between complement measurements, years 1.2 ± 0.4
  1. aA low C3 and/or C4 result
  2. bAt least one episode of hypocomplementaemia over the study period