Serum selenium

Table 4.2.a. Serum selenium: Total population

Geometric mean and selected percentiles of serum concentrations (in ng/mL) for the total U.S. population aged 3 years and older, National Health and Nutrition Examination Survey, 1999–2000.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 3-11 years

112

(110-114)

93.0

(91.0-96.0)

113

(111-114)

130

(127-133)

1186

3–5 years

107

(104-110)

90.0

(83.0-94.0)

110

(105-112)

128

(124-131)

343

6–11 years

114

(111-116)

95.0

(93.0-102)

113

(111-116)

130

(128-134)

843

Males

Total, 3-11 years

113

(110-116)

94.0

(91.0-98.0)

114

(111-116)

134

(129-137)

626

3–5 years

108

(103-112)

87.0

(64.0-95.0)

108

(104-112)

129

(123-136)

188

6–11 years

115

(111-119)

96.0

(91.0-104)

114

(110-121)

134

(129-137)

438

Females

Total, 3-11 years

111

(108-113)

93.0

(90.0-96.0)

112

(110-116)

128

(126-131)

560

3–5 years

107

(102-111)

89.0

(72.0-96.0)

110

(105-115)

126

(119-131)

155

6–11 years

112

(109-115)

93.0

(89.0-98.0)

113

(109-117)

128

(126-131)

405

Table 4.2.b. Serum selenium: Mexican Americans

Geometric mean and selected percentiles of serum concentrations (in ng/mL) for Mexican Americans in the U.S. population aged 3 years and older, National Health and Nutrition Examination Survey, 1999–2000.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 3-11 years

110

(107-113)

93.0

(87.0-96.0)

109

(106-113)

126

(123-131)

477

3–5 years

108

(104-112)

90.0

(83.0-98.0)

107

(103-113)

124

(120-129)

131

6–11 years

111

(108-114)

95.0

(91.0-100)

111

(107-114)

128

(123-133)

346

Males

Total, 3-11 years

111

(108-115)

93.0

(85.0-98.0)

111

(108-114)

129

(125-135)

262

3–5 years

109

(105-113)

87.0†

(83.0-99.0)

108

(104-114)

125†

(120-135)

71

6–11 years

112

(109-116)

93.0

(87.0-100)

111

(107-115)

133

(126-135)

191

Females

Total, 3-11 years

108

(105-112)

95.0

(89.0-98.0)

108

(105-114)

123

(118-126)

215

3–5 years

106

(100-112)

89.0†

(76.0-98.0)

105

(100-112)

123†

(116-130)

60

6–11 years

109

(106-112)

96.0

(87.0-99.0)

111

(105-114)

123

(118-132)

155

† Estimate is subject to greater uncertainty due to small cell size.

Table 4.2.c. Serum selenium: Non-Hispanic blacks

Geometric mean and selected percentiles of serum concentrations (in ng/mL) for non-Hispanic blacks in the U.S. population aged 3 years and older, National Health and Nutrition Examination Survey, 1999–2000.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 3-11 years

107

(104-110)

91.0

(87.0-94.0)

107

(104-111)

124

(120-126)

341

3–5 years

104

(101-107)

91.0†

(84.0-94.0)

104

(102-109)

121†

(116-125)

98

6–11 years

108

(105-112)

92.0

(87.0-94.0)

108

(105-112)

124

(121-130)

243

Males

Total, 3-11 years

108

(105-112)

91.0

(86.0-94.0)

109

(104-113)

124

(118-130)

173

3–5 years

104

(99.4-109)

83.0†

(50.0-91.0)

105

(103-112)

118†

(113-131)

56

6–11 years

110

(106-115)

92.0

(86.0-101)

110

(105-115)

126

(119-133)

117

Females

Total, 3-11 years

106

(104-108)

91.0

(87.0-95.0)

107

(103-109)

122

(118-124)

168

3–5 years

105

(101-109)

93.0†

(84.0-96.0)

103

(98.0-112)

120†

(112-127)

42

6–11 years

106

(104-109)

92.0

(87.0-96.0)

106

(103-110)

121

(118-124)

126

† Estimate is subject to greater uncertainty due to small cell size.

Table 4.2.d. Serum selenium: Non-Hispanic whites

Geometric mean and selected percentiles of serum concentrations (in ng/mL) for non-Hispanic whites in the U.S. population aged 3 years and older, National Health and Nutrition Examination Survey, 1999–2000.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 3-11 years

113

(110-116)

94.0

(90.0-102)

116

(112-118)

130

(127-135)

265

3–5 years

107

(102-113)

87.0†

(57.0-103)

114

(105-118)

130†

(123-133)

81

6–11 years

115

(111-119)

94.0

(90.0-104)

116

(111-120)

131

(127-136)

184

Males

Total, 3-11 years

113

(109-118)

93.0

(91.0-102)

114

(109-121)

134

(128-137)

140

3–5 years

106

(98.9-114)

87.0†

(57.0-99.0)

105

(99.0-122)

125†

(123-135)

41

6–11 years

116

(110-122)

102†

(84.0-110)

115

(110-123)

134†

(129-139)

99

Females

Total, 3-11 years

112

(108-117)

94.0

(80.0-102)

116

(111-119)

130

(126-132)

125

3–5 years

108

(101-117)

80.0†

(33.0-107)

114

(107-118)

130†

(120-133)

40

6–11 years

114

(109-119)

93.0†

(79.0-105)

118

(110-120)

130†

(126-135)

85

† Estimate is subject to greater uncertainty due to small cell size.