Platelet count

The normal platelet count in an adult is about 130,000 to 450,000 platelets per microliter (x 10-6/Liter) of blood. Platelet counts may vary by ethnicity.^18,19

The following tables are adapted from Segal and Molitamo. Ann Epidemiol. 2006; 16:123-130:

 

Table 1. Geometric mean platelet counts for men, stratified by ethnicity and age
(x10³/mL) (95% confidence interval)

	Unadjusted	Model 1	Model 2	Model 3
Non-Hispanic white
17-19	260 (254-266)	258 (252-264)	259 (254-264)	258 (253-264)
20-29	251 (245-257)	250 (244-256)	253 (247-258)	252 (246-257)
30-39	252 (245-258)	251 (244-257)	254 (247-261)	253 (247-260)
40-49	249 (245-255)	249 (243-254)	252 (247-257)	251 (243-256)
50-59	253 (245-260)	254 (247-261)	256 (250-263)	256 (249-262)
60-69	242 (235-249)	243 (237-250)	245 (239-252)	245 (239-251)
>70	232 (226-239)	235 (228-241)	235 (229-242)	235 (228-241)
Non-Hispanic black
17-19	271 (264-279)	267 (260-274)	275 (267-283)	274 (266-282)
20-29	262 (257-268)	259 (253-265)	267 (261-274)	267 (261-273)
30-39	263 (256-269)	259 (253-266)	269 (262-276)	269 (262-276)
40-49	260 (255-266)	257 (251-263)	267 (261-275)	267 (260-273)
50-59	264 (257-271)	262 (255-270)	272 (264-279)	271 (264-279)
60-69	252 (245-260)	252 (245-259)	260 (253-268)	260 (253-269)
>70	242 (235-249)	243 (236-250)	250 (243-257)	249 (242-256)
Mexican American
17-19	270 (263-277)	266 (258-273)	263 (255-270)	262 (255-270)
20-29	261 (255-267)	257 (251-264)	256 (250-263)	256 (249-262)
30-39	261 (254-268)	258 (251-266)	258 (250-265)	257 (250-264)
40-49	259 (252-266)	256 (249-263)	255 (248-262)	255 (248-262)
50-59	262 (255-270)	261 (254-269)	260 (252-267)	260 (252-268)
60-69	251 (244-259)	251 (243-258)	249 (242-256)	248 (242-256)
>70	241 (234-249)	242 (234-249)	239 (231-246)	238 (231-246)

Unadjusted indicates no covariates; model 1, adjusted for nutritional covariates; model 2, adjusted for nutritional and inflammatory covariates; and model 3, adjusted for nutritional and inflammatory covariates and alcohol use.

 

Table 2. Geometric mean platelet counts for women, stratified by ethnicity and age
(x10³/mL) (95% confidence interval)

	Unadjusted	Model 1	Model 2	Model 3
Non-Hispanic white
17-19	284 (279-290)	281 (276-287)	280 (275-286)	280 (275-285)
20-29	275 (270-273)	272 (268-277)	273 (268-278)	273 (267-278)
30-39	275 (269-281)	273 (267-279)	275 (268-281)	275 (268-281)
40-49	273 (267-277)	271 (266-275)	272 (267-277)	272 (267-277)
50-59	276 (270-283)	276 (270-283)	277 (272-284)	277 (271-283)
60-69	264 (258-272)	264 (259-272)	266 (259-272)	265 (259-272)
>70	254 (247-261)	255 (249-263)	255 (248-261)	254 (248-261)
Non-Hispanic black
17-19	300 (290-304)	291 (284-298)	297 (290-304)	297 (290-305)
20-29	287 (281-292)	282 (276-287)	290 (284-296)	289 (283-295)
30-39	287 (281-293)	283 (277-288)	292 (285-298)	291 (285-298)
40-49	284 (278-289)	280 (275-285)	289 (283-295)	289 (283-295)
50-59	288 (282-295)	286 (279-292)	294 (287-301)	294 (288-301)
60-69	276 (269-283)	274 (267-282)	282 (275-289)	281 (274-289)
>70	265 (258-272)	264 (257-272)	270 (263-277)	270 (263-277)
Mexican American
17-19	295 (288-302)	290 (283-297)	284 (277-292)	284 (277-292)
20-29	285 (279-291)	280 (275-287)	277 (271-284)	277 (271-284)
30-39	285 (278-292)	281 (275-288)	279 (271-286)	279 (272-287)
40-49	283 (277-289)	278 (272-284)	276 (270-283)	277 (270-283)
50-59	287 (279-294)	285 (277-292)	281 (274-289)	282 (275-289)
60-69	274 (267-281)	273 (266-280)	269 (262-277)	269 (262-277)
>70	263 (256-271)	263 (255-271)	258 (250-266)	258 (251-267)

Unadjusted indicates no covariates; model 1, adjusted for nutritional covariates; model 2, adjusted for nutritional and inflammatory covariates; and model 3, adjusted for nutritional and inflammatory covariates and alcohol use.

 

References