Description

The area of a cross-section of the upper arm at its midpoint occupied by fat is approximated by subtracting the area occupied by muscle from the total cross-sectional area.


Parameters:

(1) mid arm circumference in cm

(2) triceps skin fold (TSF) in mm

(3) gender of the patient

(4) age of the patient in years

 

mid-arm fat area in mm^2 =

= (mid arm area in mm^2) - (mid arm muscle area in mm^2) =

= (((10 * (mid-arm circumference in cms))^2) / (4 * (π))) - ((((10 * (mid-arm circumference in cms)) - ((π) * (TSF in mm)) ^ 2) / ( 4 * (π)) =

= (5 * (mid-arm circumference in cms) * (TSF in mm)) - (((π)^2) * ((TSF)^2) / (4 * (π)))

 

Percentiles of Upper Arm Fat Areas in square millimeters in Normal Whites (Frischanco)

 

 

Men

Women

Age

5th%

50th%

95th%

5th%

50th%

95th%

1-1.9

452

741

1176

401

706

1140

2-2.9

434

737

1148

469

747

1173

3-3.9

464

736

1151

473

822

1158

4-4.9

428

722

1085

490

766

1236

5-5.9

446

713

1299

470

812

1536

6-6.9

371

678

1519

464

827

1436

7-7.9

423

758

1511

491

920

1644

8-8.9

410

725

1558

527

1042

2482

9-9.9

485

859

2081

642

1219

2524

10-10.9

523

982

2609

616

1141

3005

11-11.9

536

1148

2574

707

1301

3690

12-12.9

554

1172

3580

782

1511

3369

13-13.9

475

1096

3322

726

1625

4150

14-14.9

453

1082

3508

981

1818

3765

15-15.9

521

937

3100

839

1886

4195

16-16.9

542

1078

3041

1126

2006

4236

17-17.9

598

1096

2888

1042

2104

5159

18-18.9

560

1264

3928

1003

2104

3733

19-24.9

594

1406

3652

1046

2166

4896

25-34.9

675

1752

3786

1173

2548

5560

35-44.9

703

1792

3624

1336

2898

5847

45-54.9

749

1741

3928

1459

3244

6140

55-64.9

658

1645

3466

1345

3369

6152

65-74.9

573

1621

3327

1363

3063

5530

 


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