Table 4.

Association between CD3 + CD4⁺ T-cell count and ARDS: dose–response relationship and threshold effect analysis.

Variables	Adjusted OR (95% CI)	p-value
T cells CD3 + CD4 + count (continuous variable)
Per 1-cell/μL increase	1.00 (1.00 ~ 1.00)	0.009
Per 50-cell/μL increase	0.89 (0.82 ~ 0.97)	0.009
Per 100-cell/μL increase	0.80 (0.67 ~ 0.94)	0.009
Threshold effect analysis
≥227 cells/μL (per 50-cell/μL increase)	1.244 (0.646 ~ 2.396)	0.5130
<227 cells/μL (per 50-cell/μL increase)	0.832 (0.735 ~ 0.941)	0.0035

Analysis adjusted for age, sex, albumin, Tbil, neutrophil count, C-reactive protein (CRP), procalcitonin (PCT), cerebrovascular disease, and heart failure. OR, odds ratio; CI, confidence interval.