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Secular trends (1/1997 to 5/2006) in mean (±SEM) laboratory values of patients with SF-36 data between 6 and 18 months after starting hemodialysis (n = 11,079): Kt/V (1,004 missing values) (A), serum albumin concentration (1,373 missing values) (B), phosphorous concentration (1,270 missing values) (C), and hemoglobin concentration (1,214 missing values) (D). The values chosen were those closest in time to the date of SF-36 questionnaire administration.
