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. Author manuscript; available in PMC: 2006 May 19.
Published in final edited form as: J Nutr. 2002 Apr;132(4):697–702. doi: 10.1093/jn/132.4.697

TABLE 2.

Characteristics of participants with 5-y serum zinc measures vs. characteristics of all AREDS participants in the AMD clinical trial

Characteristic 5-y serum zinc All participants
Total participants, n 717 3640
Women, % 59 56
Median age, y 69 69
Age range, y 55–80 55–80
Completed high school, % 93 90
Caucasian, % 97 96
Chose to take Centrum, % 65 67
Body mass index, kg/m2
 25th percentile 24.2 24.2
 Median 26.6 26.8
 75th percentile 30.0 30.1
Zinc intake1
 Total participants, n 717 3635
 Intake,2 mg 9.8 ± 0.2 9.4 ± 0.1
  25th percentile 6.3 5.9
  Median 8.6 8.3
  75th percentile 11.8 11.4
1

From Food frequency questionnaire.

2

Mean ± sem.

See Table 1 for abbreviations.