Table 3.

Association of admission hemoglobin level with 30-day mortality in three models.

OR(95%CI), P value
Exposure	Crude model	Model I	Model II
Hemoglobin level(per 1 g/dl increment)	0.96 (0.94, 0.99) 0.0023	0.96 (0.93, 0.98) 0.0010	0.87 (0.79, 0.95) 0.0020
Hemoglobin level(g/dl) quantiles
Q0(≤ 8.4 g/dl, n = 1189)	Ref	Ref	Ref
Q1(8.5–9.6 g/dl, n = 1304)	0.87 (0.74, 1.03) 0.1179	0.84 (0.71, 1.00) 0.0470	0.81 (0.66, 1.00) 0.0469
Q2(9.7–10.8 g/dl, n = 1190)	0.84 (0.71, 1.00) 0.0470	0.80 (0.67, 0.95) 0.0129	0.71 (0.55, 0.91) 0.0074
Q3(10.9–12.1 g/dl, n = 1303)	0.73 (0.61, 0.86) 0.0002	0.68 (0.57, 0.81) < 0.0001	0.55 (0.40, 0.75) 0.0001
Q4(≥ 12.2 g/dl, n = 1263)	0.74 (0.63, 0.88) 0.0007	0.72 (0.60, 0.86) 0.0002	0.42 (0.28, 0.64) < 0.0001
P for trend	< 0.0001	< 0.0001	< 0.0001

Crude model adjusted for: None; Model I adjusted for: age; gender; Model II adjusted for: age; gender; HR; SBP; DBP; RR; AG; ALT, AST, bicarbonate, INR, total bilirubin; total calcium; creatinine; chloride; hematocrit; lactate; PLT; PT; TT; RBC; urea nitrogen; WBC; sodium; renal disease; CAD; diabetes; hypertension; SOFA; APAHCEII.

ALT, alanine aminotransferase; AST, aspartate aminotransferase; CAD, coronary artery disease; SBP, systolic blood pressure; DBP, diastolic blood pressure; HR, heart rate; RR, respiratory rate; WBC, white blood cells; PLT, platelet; RBC, red blood cells; PT, prothrombin time; TT, thrombin time; INR, international normalized ratio; AG, anion gap; SOFA, sequential organ failure assessment; APACHE, acute physiology and chronic health evaluation; OR, odds ratio; CI, confidential interval.