In examining patients with only complete data, excluding CRP (n = 115 patients), only lymphopenia (OR 6.55; 95 % CI 2.34–20.90) and a length of stay greater than 14 days (OR 10.63; 95 % CI 2.94–50.46) were associated with sepsis development (Tables e2 and e3). Here, CRP is linked to lymphopenia.