Table 5.
Comparison of CD3 + CD4 + T cell counts across ARDS severity groups.
| ARDS severity | n | CD3 + CD4 + T cell count (cells/μL) | Statistical method | Test statistic | p-value |
|---|---|---|---|---|---|
| Overall | 227 | 235.0 (143.0, 426.0) | Kruskal-Wallis test | H = 27.916 | <0.001 |
| Non-ARDS | 100 | 378.0 (204.8, 533.8) | |||
| Mild | 55 | 214.0 (141.5, 331.5) | |||
| Moderate | 54 | 193.5 (114.2, 344.5) | |||
| Severe | 18 | 144.0 (75.2, 205.0) | |||
| Trend analysis | Jonckheere-Terpstra test | Z = −5.415* | <0.001 |
Data are presented as median (interquartile range, Q1–Q3). The overall comparison among the four groups was performed using the Kruskal-Wallis test. The Jonckheere-Terpstra test was used for trend analysis across ARDS severity groups. * Standardized test statistic (negative value indicates a decreasing trend with increasing ARDS severity).