K
Blood Concentrations of Folate and Vitamin B12 from the Third National Health and Nutrition Examination Survey (NHANES III), 1988–1994
TABLE K-1 Serum Folate (ng/mL) of Persons Aged 4 Years and Older: Mean and Selected Percentiles, United States, 1988–1994
Selected Percentiles |
||||||||
5th |
10th |
15th |
25th |
50th |
75th |
85th |
90th |
95th |
4.4 |
5.3 |
5.9 |
6.9 |
9.4 |
12.8 |
14.9 |
16.9 |
21.8 |
3.4 |
4.0 |
4.8 |
5.6 |
7.7 |
10.9 |
12.8 |
15.3 |
18.1 |
2.3 |
2.6 |
2.9 |
3.4 |
4.7 |
7.4 |
8.7 |
10.5 |
13.2 |
1.8 |
2.2 |
2.5 |
2.9 |
4.0 |
6.2 |
7.7 |
8.7 |
11.1 |
1.9 |
2.3 |
2.7 |
3.2 |
4.6 |
7.1 |
9.2 |
10.5 |
12.8 |
2.2 |
2.7 |
3.0 |
3.7 |
5.7 |
9.3 |
12.0 |
14.3 |
17.8 |
2.3 |
3.1 |
3.6 |
4.5 |
6.9 |
11.1 |
15.3 |
17.9 |
21.7 |
3.1 |
3.8 |
4.0 |
4.9 |
6.8 |
10.3 |
11.6 |
13.9 |
17.8 |
2.1 |
2.5 |
2.7 |
3.2 |
4.9 |
7.2 |
8.7 |
9.7 |
12.1 |
1.8 |
2.3 |
2.5 |
3.1 |
4.6 |
7.2 |
9.0 |
10.5 |
13.1 |
1.9 |
2.3 |
2.7 |
3.3 |
4.9 |
8.2 |
10.6 |
12.4 |
16.0 |
2.4 |
2.9 |
3.3 |
4.2 |
6.6 |
11.4 |
14.6 |
17.0 |
22.2 |
2.9 |
3.6 |
4.0 |
5.1 |
8.0 |
13.7 |
17.5 |
20.6 |
26.6 |
2.7a |
3.4 |
3.7 |
4.7 |
8.4 |
13.9 |
16.6 |
18.5 |
20.5a |
2.1 |
2.5 |
2.9 |
3.6 |
5.5 |
9.0 |
11.4 |
13.5 |
17.2 |
a Value does not meet standard of reliability or precision. SOURCE: NHANES III, 1988–1994, unpublished data, C.L.Johnson and J.D.Wright, National Center for Health Statistics, Centers for Disease Control and Prevention, 1997. |
TABLE K-2 Erythrocyte Folate (ng/mL) of Persons Aged 4 Years and Older: Mean and Selected Percentiles, United States, 1988–1994
Selected Percentiles |
||||||||
5th |
10th |
15th |
25th |
50th |
75th |
85th |
90th |
95th |
123 |
140 |
151 |
170 |
212 |
258 |
289 |
312 |
359 |
102 |
116 |
129 |
149 |
190 |
242 |
280 |
306 |
342 |
83 |
94 |
101 |
116 |
149 |
197 |
237 |
261 |
301 |
84 |
95 |
107 |
119 |
151 |
192 |
219 |
244 |
300 |
86 |
102 |
112 |
127 |
166 |
217 |
255 |
282 |
335 |
93 |
108 |
120 |
139 |
188 |
269 |
318 |
353 |
425 |
93 |
113 |
125 |
149 |
207 |
305 |
362 |
419 |
471 |
87 |
104 |
113 |
129 |
167 |
216 |
239 |
260 |
288 |
77 |
89 |
98 |
115 |
141 |
190 |
221 |
240 |
269 |
77 |
88 |
97 |
116 |
149 |
206 |
242 |
270 |
315 |
84 |
97 |
107 |
125 |
172 |
239 |
286 |
324 |
369 |
95 |
113 |
128 |
149 |
206 |
296 |
356 |
408 |
462 |
96 |
116 |
133 |
160 |
228 |
325 |
391 |
432 |
519 |
114a |
123 |
140 |
164 |
248 |
344 |
379 |
429 |
461a |
87 |
101 |
113 |
130 |
175 |
238 |
284 |
319 |
380 |
a Value does not meet standard of reliability or precision. SOURCE: NHANES III, 1988–1994, unpublished data, C.L.Johnson and J.D.Wright, National Center for Health Statistics, Centers for Disease Control and Prevention, 1997. |
TABLE K-3 Serum Vitamin B12 (pg/mL) of Persons Aged 4 Years and Older: Mean and Selected Percentiles, United States, 1991–1994
Selected Percentiles |
||||||||
5th |
10th |
15th |
25th |
50th |
75th |
85th |
90th |
95th |
409 |
474 |
517 |
569 |
720 |
909 |
1,034 |
1,103 |
1,270 |
344 |
379 |
420 |
470 |
590 |
746 |
825 |
868 |
947 |
261 |
335 |
344 |
395 |
485 |
589 |
656 |
767 |
871 |
251 |
281 |
312 |
355 |
466 |
550 |
623 |
666 |
762 |
236 |
287 |
305 |
348 |
436 |
556 |
633 |
681 |
803 |
190 |
247 |
273 |
317 |
414 |
540 |
630 |
688 |
884 |
187 |
218 |
239 |
298 |
382 |
512 |
629 |
719 |
881 |
344 |
383 |
401 |
453 |
569 |
694 |
794 |
880 |
1,060 |
276 |
300 |
319 |
362 |
460 |
618 |
733 |
791 |
871 |
214 |
250 |
277 |
328 |
437 |
580 |
669 |
721 |
805 |
223 |
262 |
287 |
332 |
427 |
589 |
666 |
729 |
827 |
224 |
266 |
291 |
344 |
465 |
605 |
698 |
769 |
919 |
186 |
232 |
261 |
315 |
436 |
622 |
718 |
795 |
953 |
232a |
246 |
255 |
293 |
421 |
501 |
549 |
579 |
631a |
233 |
274 |
303 |
351 |
466 |
615 |
707 |
790 |
924 |
SOURCE: NHANES III, 1988–1994, unpublished data, C.L.Johnson and J.D.Wright, National Center for Health Statistics, Centers for Disease Control and Prevention, 1997. |
TABLE K-4 Serum Homocysteine (µmol/L) of Persons Aged 12 Years and Older: Mean and Selected Percentiles, United States, 1991–1994
Selected Percentiles |
||||||||
5th |
10th |
15th |
25th |
50th |
75th |
85th |
90th |
95th |
3.90a |
4.40 |
4.80 |
5.30 |
16.50 |
7.70 |
8.59 |
8.61 |
9.51a |
4.80 |
5.40 |
5.60 |
6.20 |
7.40 |
9.01 |
9.81 |
11.60 |
15.30 |
5.70 |
6.40 |
6.80 |
7.60 |
9.20 |
11.20 |
12.90 |
13.90 |
17.53 |
6.00 |
6.40 |
6.80 |
7.70 |
9.00 |
10.89 |
12.60 |
13.90 |
16.38 |
6.40 |
7.40 |
7.80 |
8.51 |
10.20 |
12.89 |
13.90 |
15.30 |
18.38 |
6.80 |
7.90 |
8.40 |
9.31 |
12.11 |
15.70 |
17.72 |
19.01 |
22.70 |
3.40a |
3.70 |
4.30 |
4.70 |
5.80 |
7.20 |
7.91 |
8.51 |
9.51a |
3.50 |
4.20 |
4.90 |
5.60 |
6.50 |
7.90 |
9.01 |
9.90 |
12.10 |
4.70 |
5.10 |
5.40 |
5.90 |
7.20 |
9.40 |
11.10 |
12.20 |
14.09 |
4.50 |
5.09 |
5.50 |
6.10 |
7.50 |
9.20 |
10.91 |
12.40 |
14.30 |
5.20 |
5.70 |
6.30 |
7.40 |
8.90 |
11.01 |
12.80 |
14.10 |
16.01 |
6.40 |
7.01 |
7.50 |
8.40 |
10.61 |
13.40 |
15.31 |
17.30 |
20.53 |
2.80a |
2.80a |
3.50 |
3.50 |
4.90 |
6.40 |
7.30 |
7.80a |
9.30a |
4.90 |
5.50 |
6.00 |
6.70 |
8.51 |
10.81 |
12.60 |
13.90 |
16.51 |