Table 4.1.a. Urinary iodine: Total population

Geometric mean and selected percentiles of urine concentrations (in ng/mL) for the total U.S. population aged 6 years and older, National Health and Nutrition Examination Survey, 2001–2002.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 6 years and older

162

(152-172)

44.0

(41.0-49.0)

167

(158-176)

503

(466-543)

2837

6–11 years

235

(208-266)

78.0

(61.0-89.0)

249

(221-289)

682

(571-737)

374

12–19 years

192

(178-207)

58.0

(42.0-68.0)

206

(189-214)

594

(511-693)

831

20–39 years

148

(132-166)

49.0

(34.0-58.0)

153

(136-175)

429

(356-482)

627

40–59 years

140

(121-162)

37.0

(25.0-45.0)

142

(118-169)

478

(403-577)

496

60 years and older

177

(156-200)

57.0

(49.0-65.0)

173

(152-199)

524

(440-633)

509

Males

Total, 6 years and older

192

(178-208)

64.0

(54.0-73.0)

197

(179-209)

542

(478-619)

1333

6–11 years

250

(213-294)

86.0

(55.0-126)

266

(223-316)

682

(498-864)

185

12–19 years

238

(214-265)

75.0

(67.0-104)

234

(210-271)

639

(545-896)

386

20–39 years

176

(155-200)

63.0

(48.0-89.0)

178

(143-213)

425

(345-479)

271

40–59 years

169

(147-194)

44.0

(35.0-71.0)

172

(149-207)

496

(391-596)

255

60 years and older

211

(172-258)

75.0

(40.0-102)

202

(163-249)

615

(417-904)

236

Females

Total, 6 years and older

137

(127-148)

37.0

(31.0-43.0)

140

(127-157)

458

(421-516)

1504

6–11 years

220

(182-267)

64.0

(44.0-88.0)

239

(185-293)

638

(524-738)

189

12–19 years

154

(137-173)

40.0

(28.0-62.0)

174

(148-193)

454

(368-587)

445

20–39 years

127

(105-153)

34.0

(23.0-53.0)

133

(108-162)

425

(314-507)

356

40–59 years

115

(93.2-141)

28.0

(22.0-36.0)

111

(78.0-146)

456

(292-695)

241

60 years and older

155

(135-177)

51.0

(44.0-62.0)

156

(117-189)

440

(349-550)

273

Table 4.1.b. Urinary iodine: Mexican Americans

Geometric mean and selected percentiles of urine concentrations (in ng/mL) for Mexican Americans in the U.S. population, age 6 years and older, National Health and Nutrition Examination Survey, 2001–2002.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 6 years and older

176

(163-189)

56.0

(45.0-60.0)

186

(167-205)

487

(442-518)

720

6–11 years

241

(210-277)

95.0

(62.0-150)

231

(193-297)

621

(487-699)

112

12–19 years

179

(161-198)

56.0

(40.0-72.0)

190

(160-213)

524

(392-583)

266

20–39 years

168

(142-198)

50.0

(40.0-66.0)

173

(141-218)

442

(375-534)

166

40–59 years

156

(124-197)

31.0†

(14.0-74.0)

169

(146-215)

472†

(380-700)

90

60 years and older

152

(131-176)

56.0†

(36.0-75.0)

156

(115-203)

427†

(303-477)

86

Males

Total, 6 years and older

201

(173-233)

60.0

(43.0-79.0)

203

(172-236)

524

(442-792)

325

6–11 years

246

(190-318)

76.0†

(42.0-138)

246

(174-374)

677†

(469-926)

53

12–19 years

190

(163-221)

58.0

(33.0-100)

198

(153-226)

511

(344-583)

113

20–39 years

195

(146-261)

58.0†

(28.0-79.0)

197

(137-255)

495†

(374-1170)

75

40–59 years

191

(134-274)

37.0†

(15.0-146)

193

(154-311)

453†

(346-713)

48

60 years and older

209

(165-265)

82.0†

(13.0-161)

203

(154-345)

455†

(324-1210)

36

Females

Total, 6 years and older

151

(136-168)

45.0

(31.0-60.0)

169

(137-202)

441

(370-480)

395

6–11 years

237

(193-290)

107†

(79.0-150)

218

(179-297)

510†

(370-656)

59

12–19 years

167

(143-194)

46.0

(32.0-62.0)

189

(146-213)

506

(351-676)

153

20–39 years

140

(109-179)

40.0†

(22.0-69.0)

167

(97.0-247)

331†

(294-480)

91

40–59 years

123

(85.4-178)

22.0†

(7.00-58.0)

125

(86.0-178)

433†

(186-532)

42

60 years and older

120

(94.1-154)

51.0†

(28.0-61.0)

111

(82.0-158)

299†

(158-521)

50

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

Table 4.1.c. Urinary iodine: Non-Hispanic blacks

Geometric mean and selected percentiles of urine concentrations (in ng/mL) for non-Hispanic blacks in the U.S. population, age 6 years and older, National Health and Nutrition Examination Survey, 2001–2002.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 6 years and older

156

(137-178)

54.0

(45.0-65.0)

143

(124-173)

478

(402-608)

670

6–11 years

247

(201-302)

97.0

(67.0-138)

257

(175-311)

600

(467-954)

121

12–19 years

183

(151-221)

62.0

(43.0-78.0)

172

(156-200)

555

(384-695)

248

20–39 years

145

(117-181)

58.0

(31.0-95.0)

134

(106-169)

398

(306-478)

121

40–59 years

136

(99.7-185)

44.0†

(31.0-57.0)

120

(82.0-197)

627†

(275-923)

106

60 years and older

127

(91.6-176)

40.0†

(18.0-64.0)

112

(94.0-129)

268†

(213-525)

74

Males

Total, 6 years and older

161

(143-181)

55.0

(39.0-68.0)

156

(134-173)

540

(414-681)

325

6–11 years

259

(201-334)

90.0†

(53.0-149)

240

(175-318)

932†

(496-1100)

61

12–19 years

201

(162-249)

65.0

(50.0-101)

186

(161-214)

624

(381-873)

120

20–39 years

161

(127-204)

69.0†

(23.0-126)

149

(127-183)

459†

(242-745)

57

40–59 years

120

(83.6-171)

31.0†

(11.0-65.0)

113

(76.0-180)

594†

(180-1010)

55

60 years and older

120

(79.4-183)

45.0†

(25.0-99.0)

119

(56.0-232)

320†

(156-525)

32

Females

Total, 6 years and older

153

(128-182)

53.0

(41.0-60.0)

135

(108-174)

449

(352-608)

345

6–11 years

234

(177-309)

97.0†

(73.0-138)

257

(143-334)

531†

(424-744)

60

12–19 years

167

(134-207)

38.0

(32.0-68.0)

168

(146-186)

487

(366-670)

128

20–39 years

135

(103-176)

53.0†

(47.0-86.0)

121

(92.0-176)

340†

(201-471)

64

40–59 years

152

(104-223)

50.0†

(36.0-65.0)

124

(65.0-352)

702†

(350-994)

51

60 years and older

132

(69.1-252)

30.0†

(16.0-73.0)

104

(66.0-200)

255†

(208-1780)

42

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

Table 4.1.d. Urinary iodine: Non-Hispanic whites

Geometric mean and selected percentiles of urine concentrations (in ng/mL) for non-Hispanic whites in the U.S. population, age 6 years and older, National Health and Nutrition Examination Survey, 2001–2002.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 6 years and older

163

(150-176)

44.0

(40.0-49.0)

169

(158-179)

511

(468-569)

1222

6–11 years

229

(195-270)

61.0†

(44.0-92.0)

266

(206-327)

682†

(516-738)

111

12–19 years

205

(182-231)

59.0

(41.0-81.0)

214

(192-240)

619

(537-769)

248

20–39 years

148

(125-176)

47.0

(27.0-63.0)

157

(133-185)

421

(324-507)

280

40–59 years

139

(115-168)

35.0

(23.0-45.0)

138

(107-169)

480

(387-659)

258

60 years and older

185

(161-211)

56.0

(48.0-68.0)

186

(163-200)

552

(435-670)

325

Males

Total, 6 years and older

199

(180-221)

64.0

(51.0-78.0)

204

(187-219)

548

(470-653)

575

6–11 years

247

(192-319)

92.0†

(37.0-139)

271

(206-320)

682†

(389-864)

57

12–19 years

279

(246-316)

97.0

(67.0-150)

280

(223-344)

696

(586-1020)

116

20–39 years

179

(149-215)

63.0

(44.0-95.0)

181

(136-247)

407

(323-468)

112

40–59 years

174

(146-206)

43.0

(35.0-75.0)

172

(141-212)

477

(389-659)

132

60 years and older

224

(178-282)

80.0

(40.0-107)

212

(168-271)

633

(417-1040)

158

Females

Total, 6 years and older

135

(122-149)

35.0

(28.0-43.0)

140

(122-157)

473

(419-569)

647

6–11 years

211

(153-291)

58.0†

(24.0-124)

225

(129-399)

689†

(451-895)

54

12–19 years

153

(126-185)

40.0

(21.0-62.0)

175

(127-194)

454

(323-740)

132

20–39 years

126

(95.4-166)

28.0

(20.0-53.0)

133

(96.0-169)

425

(303-576)

168

40–59 years

110

(83.1-144)

28.0

(22.0-36.0)

96.0

(67.0-152)

480

(265-873)

126

60 years and older

159

(140-181)

52.0

(43.0-65.0)

158

(121-194)

444

(365-634)

167

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

Table 4.1.e. Urinary iodine: Total population (creatinine corrected)

Geometric mean and selected percentiles of urine concentrations (in μg/g creatinine) for the total U.S. population aged 6 years and older, National Health and Nutrition Examination Survey, 2001–2002.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 6 years and older

163

(153-173)

64.5

(59.5-68.3)

151

(141-165)

437

(406-470)

2835

6–11 years

273

(246-304)

116

(101-131)

257

(219-321)

699

(608-817)

374

12–19 years

149

(137-161)

66.7

(59.9-70.2)

138

(129-146)

364

(297-479)

830

20–39 years

135

(127-143)

56.7

(51.2-63.7)

128

(116-136)

346

(307-431)

627

40–59 years

151

(130-175)

59.5

(52.5-66.3)

141

(119-176)

407

(300-478)

496

60 years and older

216

(192-244)

87.2

(75.8-97.2)

200

(176-230)

518

(452-629)

508

Males

Total, 6 years and older

156

(143-171)

59.6

(53.1-69.1)

145

(136-161)

415

(368-501)

1333

6–11 years

292

(263-325)

123

(92.0-148)

321

(260-359)

774

(533-963)

185

12–19 years

162

(144-182)

63.8

(58.1-72.5)

151

(136-181)

412

(303-578)

386

20–39 years

131

(122-141)

57.9

(49.7-65.6)

119

(107-136)

341

(273-470)

271

40–59 years

133

(112-158)

52.5

(43.9-60.2)

134

(103-162)

315

(269-423)

255

60 years and older

200

(168-238)

74.8

(57.6-94.9)

190

(145-238)

474

(362-704)

236

Females

Total, 6 years and older

170

(161-179)

67.6

(63.1-70.5)

158

(146-169)

449

(426-508)

1502

6–11 years

254

(213-303)

109

(95.1-119)

220

(195-298)

631

(481-978)

189

12–19 years

136

(124-149)

66.8

(59.7-71.2)

128

(111-137)

337

(265-434)

444

20–39 years

139

(127-153)

56.1

(48.6-68.2)

133

(116-144)

359

(299-449)

356

40–59 years

171

(148-198)

65.4

(56.0-78.4)

155

(133-186)

436

(392-576)

241

60 years and older

230

(199-265)

96.9

(81.8-113)

207

(179-251)

571

(446-667)

272

Table 4.1.f. Urinary iodine: Mexican Americans (creatinine corrected)

Geometric mean and selected percentiles of urine concentrations (in μg/g creatinine) for Mexican Americans in the U.S. population aged 6 years and older, National Health and Nutrition Examination Survey, 2001–2002.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 6 years and older

164

(152-176)

65.4

(61.8-74.5)

154

(140-178)

424

(344-467)

720

6–11 years

298

(253-350)

135

(104-162)

304

(239-344)

726

(469-939)

112

12–19 years

144

(132-157)

65.2

(53.5-82.7)

132

(119-149)

314

(255-445)

266

20–39 years

146

(127-168)

63.0

(54.9-70.8)

143

(109-175)

328

(248-492)

166

40–59 years

142

(124-164)

62.0†

(40.1-83.0)

140

(117-186)

325†

(241-479)

90

60 years and older

200

(170-234)

74.3†

(61.9-112)

195

(156-245)

452†

(391-765)

86

Males

Total, 6 years and older

157

(137-181)

62.2

(53.8-74.4)

150

(125-182)

428

(308-522)

325

6–11 years

300

(227-395)

141†

(93.0-193)

304

(209-375)

766†

(459-1090)

53

12–19 years

133

(116-151)

61.1

(49.3-81.4)

123

(108-146)

282

(182-493)

113

20–39 years

144

(115-181)

57.3†

(49.4-69.3)

143

(102-182)

328†

(202-613)

75

40–59 years

130

(98.3-172)

58.9†

(9.93-108)

129

(103-214)

294†

(241-405)

48

60 years and older

193

(130-287)

84.0†

(60.9-117)

180

(110-342)

452†

(245-765)

36

Females

Total, 6 years and older

172

(154-192)

74.1

(63.2-83.7)

159

(139-184)

428

(339-534)

395

6–11 years

296

(233-375)

130†

(90.6-163)

304

(198-373)

726†

(428-1070)

59

12–19 years

157

(136-182)

73.9

(60.8-82.9)

141

(119-168)

364

(255-778)

153

20–39 years

147

(123-176)

65.4†

(42.9-89.7)

145

(108-190)

316†

(210-466)

91

40–59 years

159

(115-218)

70.0†

(40.1-119)

143

(95.1-233)

408†

(230-705)

42

60 years and older

204

(158-265)

66.3†

(58.5-122)

195

(143-257)

437†

(331-1110)

50

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

Table 4.1.g. Urinary iodine: Non-Hispanic blacks (creatinine corrected)

Geometric mean and selected percentiles of urine concentrations (in μg/g creatinine) for non-Hispanic blacks in the U.S. population aged 6 years and older, National Health and Nutrition Examination Survey, 2001–2002.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 6 years and older

113

(103-124)

45.7

(41.3-51.0)

103

(92.5-115)

321

(257-381)

669

6–11 years

209

(161-273)

89.7

(75.5-110)

206

(121-293)

510

(393-775)

121

12–19 years

110

(93.7-128)

45.9

(36.8-58.8)

95.5

(87.7-114)

303

(208-406)

247

20–39 years

94.6

(86.0-104)

42.8

(37.1-55.4)

88.3

(82.4-104)

190

(172-247)

121

40–59 years

101

(82.3-124)

37.9†

(23.6-55.9)

98.7

(69.1-130)

339†

(218-441)

106

60 years and older

122

(93.7-160)

51.3†

(38.8-59.3)

102

(93.5-117)

339†

(175-394)

74

Males

Total, 6 years and older

102

(87.9-119)

37.9

(29.0-48.1)

95.6

(79.1-118)

305

(260-356)

325

6–11 years

208

(148-292)

84.0†

(75.0-107)

204

(109-321)

510†

(356-802)

61

12–19 years

111

(89.6-138)

44.9

(33.7-60.7)

99.1

(80.0-119)

332

(201-479)

120

20–39 years

90.0

(78.5-103)

37.6†

(27.9-53.9)

83.8

(63.3-109)

300†

(153-362)

57

40–59 years

74.7

(54.5-102)

26.9†

(7.53-54.1)

73.6

(41.3-148)

188†

(116-280)

55

60 years and older

105

(85.8-129)

50.6†

(35.5-67.1)

97.1

(69.5-134)

211†

(126-359)

32

Females

Total, 6 years and older

123

(111-135)

51.9

(46.3-57.8)

108

(98.7-117)

329

(239-414)

344

6–11 years

211

(152-293)

101†

(33.7-124)

214

(120-328)

478†

(297-915)

60

12–19 years

108

(94.4-124)

45.9

(36.4-62.9)

94.3

(87.7-106)

257

(189-468)

127

20–39 years

98.2

(82.4-117)

48.6†

(37.1-67.5)

90.4

(75.0-115)

184†

(157-235)

64

40–59 years

133

(99.2-178)

48.3†

(44.6-65.4)

117

(79.3-162)

441†

(303-699)

51

60 years and older

136

(83.5-222)

51.3†

(38.8-71.8)

107

(94.7-115)

270†

(120-9060)

42

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

Table 4.1.h. Urinary iodine: Non-Hispanic whites (creatinine corrected)

Geometric mean and selected percentiles of urine concentrations (in μg/g creatinine) for non-Hispanic whites in the U.S. population aged 6 years and older, National Health and Nutrition Examination Survey, 2001–2002.

Geometric mean
(95% conf. interval)

Selected percentiles (95% conf. interval)

Sample
size

10th

50th

90th

Males and Females

Total, 6 years and older

175

(163-188)

69.2

(64.5-72.4)

164

(151-177)

452

(420-517)

1221

6–11 years

290

(256-328)

121†

(98.2-148)

298

(214-366)

738†

(570-857)

111

12–19 years

159

(145-175)

70.2

(62.5-75.3)

143

(129-175)

353

(297-578)

248

20–39 years

145

(133-157)

64.5

(52.9-69.7)

133

(121-144)

386

(322-451)

280

40–59 years

159

(133-191)

62.0

(55.9-69.8)

147

(123-191)

416

(315-562)

258

60 years and older

232

(203-265)

102

(84.3-116)

211

(188-249)

567

(455-667)

324

Males

Total, 6 years and older

167

(149-187)

66.5

(55.6-76.5)

156

(142-175)

432

(371-532)

575

6–11 years

320

(268-383)

134†

(98.2-157)

359

(237-379)

785†

(404-1200)

57

12–19 years

182

(160-206)

67.4

(57.8-89.1)

180

(143-229)

559

(297-710)

116

20–39 years

139

(122-158)

66.9

(49.7-78.7)

126

(107-145)

352

(228-514)

112

40–59 years

140

(115-171)

54.7

(43.9-64.8)

137

(99.2-179)

369

(276-439)

132

60 years and older

215

(175-264)

81.1

(54.1-116)

197

(159-263)

514

(366-830)

158

Females

Total, 6 years and older

182

(172-193)

69.6

(65.3-74.3)

169

(158-183)

468

(431-569)

646

6–11 years

260

(201-336)

106†

(85.9-132)

215

(167-368)

631†

(449-978)

54

12–19 years

140

(121-162)

69.2

(59.7-73.5)

131

(103-148)

328

(264-434)

132

20–39 years

150

(130-172)

62.7

(47.2-69.7)

138

(122-161)

397

(322-451)

168

40–59 years

182

(150-221)

69.6

(60.7-84.5)

177

(122-231)

437

(387-730)

126

60 years and older

246

(209-289)

109

(89.4-132)

212

(192-278)

571

(446-700)

166

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