Table 2.

Clinical Characteristics Associated With The Lowest Quartile (Q1) of Baseline Physical Component Scores in Unadjusted and Adjusted Models

	Unadjusted	Case-Mix	Expanded Case-Mix	Expanded Case-Mix + Laboratory
	OR (95% CI)	OR (95% CI)	OR (95% CI)	OR (95% CI)
Age at dialysis initiation (Δ10 y)	1.47 (1.30-1.67)a	1.41 (1.23-1.61)a	1.41 (1.22-1.62)a	1.40 (1.20-1.64)a
Female (vs male) sex	1.48 (1.06-2.05)a	1.42 (1.00-2.00)a	1.40 (0.99-1.99)	1.33 (0.91-1.93)
Race/ethnicity (vs Hispanic)
African American	1.15 (0.80-1.67)	1.12 (0.75-1.65)	1.08 (0.71-1.62)	1.03 (0.67-1.60)
Other	0.94 (0.60-1.47)	0.86 (0.53-1.39)	0.85 (0.52-1.38)	0.90 (0.55-1.48)
Diabetes (vs nondiabetes)	2.17 (1.54-3.08)a	1.77 (1.21-2.59)a	1.73 (1.18-2.54)a	1.59 (1.07-2.37)a
Vintage (Δ12 mo)	1.01 (0.97-1.06)	1.03 (0.99-1.08)	1.03 (0.98-1.08)	1.03 (0.98-1.08)
Married (vs nonmarried)	0.96 (0.69-1.33)	0.81 (0.57-1.17)	0.83 (0.58-1.19)	0.86 (0.59-1.24)
Primary insurance (vs Medicare/Medicaid)
Private	0.62 (0.34-1.11)	0.69 (0.37-1.28)	0.71 (0.38-1.31)	0.69 (0.37-1.28)
Other/unknown	0.74 (0.43-1.26)	0.99 (0.56-1.76)	0.97 (0.55-1.73)	1.00 (0.56-1.80)
AVF/AVG (vs CVC)	0.95 (0.60-1.51)	0.80 (0.49-1.31)	0.83 (0.50-1.35)	0.88 (0.53-1.46)
BMI (Δ5 kg/m2)	1.16 (1.03-1.30)a	1.13 (0.99-1.28)	1.12 (0.98-1.27)	1.10 (0.96-1.25)
Serum albumin (Δ0.5 mg/dL)	0.55 (0.42-0.71)a	0.64 (0.48-0.84)a	0.64 (0.48-0.85)a	0.64 (0.48-0.86)a
Serum creatinine (Δ1.0 g/dL)	0.90 (0.84-0.96)a	0.98 (0.91-1.07)	0.98 (0.91-1.07)	1.00 (0.92-1.09)
Normalized protein catabolic rate (Δ0.2 g/kg/d)	0.93 (0.81-1.06)	0.95 (0.82-1.10)	0.96 (0.83-1.11)	1.01 (0.87-1.18)
Hemoglobin (Δ1 g/dL)	0.99 (0.84-1.17)	1.02 (0.85-1.22)	1.02 (0.85-1.23)	1.03 (0.86-1.24)

Note: Reference quartiles: Q2-Q4.

Abbreviations: AVF, arteriovenous fistula; AVG, arteriovenous graft; BMI, body mass index; CI, confidence interval; CVC, central venous catheter; OR, odds ratio; Q, quartile.

^aSignificant estimates.