Table 12. — Age at death and mortality rate of rats fed various diets 





Rats 



Ag 



e at death 







Rats dyin 



g before 



i 



Strain and diet 



Aver- 

 age 



50 per- 

 cent 

 died 

 by- 



Old- 

 est 

 rat 



400 



days 



500 



days 



600 



days 



700 



days 



800 



days 



900 



days 



1,000 



days 



1,100 



days 



BHE rats 

 All fed— 



SP 8 HVO 



Num- 

 ber 

 53 



85 



21 

 21 

 21 

 21 

 21 



8 

 8 

 8 



8 



9 

 9 

 9 



9 



9 



8 

 8 

 8 

 8 



8 



9 

 9 

 9 

 9 

 9 

 9 



16 

 16 



8 

 8 

 8 



18 

 18 



10 

 10 

 10 

 10 



25 

 19 



3 

 3 



4 



4 



Days 

 629 

 464 



579 

 467 

 580 

 589 

 525 



444 

 441 

 475 



423 



458 

 432 

 464 



427 

 443 



415 



477 

 410 

 405 



414 



631 



618 

 524 

 553 

 602 

 514 



618 

 566 



676 



582 

 593 



680 

 654 



482 

 578 

 490 

 548 



559 

 393 



590 

 473 



686 



624 



Days 

 616 

 449 



574 

 419 

 578 

 603 

 541 



435 

 414 

 431 



400 



426 

 410 

 423 



418 



438 



375 

 474 

 406 

 361 



358 



643 

 569 



444 

 506 

 610 



487 



614 

 518 



623 

 522 

 505 



653 

 621 



465 

 552 

 441 

 525 



522 

 381 



Days 

 917 

 705 



889 

 705 

 903 



852 

 722 



581 

 551 

 632 



642 



626 



581 

 625 



508 



527 



597 

 578 

 574 

 533 



520 



774 

 775 

 706 

 776 

 774 

 707 



889 

 799 



917 

 810 

 813 



917 



893 



604 

 749 

 585 

 696 



762 

 591 



727 

 629 



805 



767 



Per- 

 cent 

 2 



28 



5 

 38 

 19 



5 

 23 



25 

 38 

 25 



38 



33 

 22 

 33 



22 



22 



50 

 25 



38 

 50 



50 





 11 

 11 

 22 

 11 

 33 



6 

 12 





 

 





 



10 

 10 

 10 

 10 



8 

 58 







67 







25 



Per- 

 cent 

 17 

 64 



24 

 57 

 43 

 29 

 37 



62 

 88 

 62 



75 



78 

 89 

 56 



79 



78 



88 

 62 



88 

 75 



88 



22 

 11 

 67 

 44 

 22 

 56 



25 

 44 





 38 

 38 



11 



17 



60 

 30 

 50 

 30 



32 



74 



33 



67 







25 



Per- 

 cent 

 43 



88 



57 

 76 

 57 

 43 

 66 



100 

 100 



88 



88 



89 



100 



89 



100 



100 



100 

 100 

 100 

 100 



100 



33 

 44 

 67 

 56 

 33 

 67 



44 

 56 



25 

 62 

 50 



28 

 38 



90 



50 



100 



70 



64 

 100 



33 



67 



25 



25 



Per- 

 cent 

 73 

 99 



86 

 95 

 62 



81 



85 



Per- 

 cent 

 86 

 100 



91 



100 



86 



95 



100 



Per- 

 cent 

 96 



Per- 

 cent 

 100 



Per- 

 cent 



SPE 





Littermates fed — 



SP 8 HVO 



100 







SPE.. 







SPM_. 



95 

 100 



100 





SPB_ 





SPPB 







Littermates fed — 



SPE supplemented with — 

 None.. _ -_ 









Choline, 0.5% 













B 12 , 0.01 mg./lOO gm ... 



100 

 100 



100 











Choline, 0.5% + B 12 , 0.01 

 msj./lOO gm 











Littermates fed- — 



SPE supplemented with — 

 None - 











Choline, 0.5% 











B 6 , 0.5 mg./lOOgm 



100 











Choline, 0.5% + B , 0.5 mg./ 

 100 gm 











Choline, 0.5% + B 6 , 0.5 mg./ 

 100 gm. +B,2, 0.01 mg./ 

 100 gm.. 













Littermates fed — 



SPE supplemented with — 

 None 













Cholesterol, 0.46% 



Cholesterol, 1.38% 























Ascorbic acid, 0.2% 













Ascorbic acid, 0.2%+ cho- 

 lesterol, 0.46% 













Littermates fed — 



SP8HVO 



67 



67 

 89 

 78 

 78 



78 



69 

 81 



75 

 75 



88 



56 

 61 



100 

 70 



100 

 100 

 100 

 100 

 100 

 100 



94 

 100 



88 

 88 

 88 



78 

 83 









SP 16 HVO 









SP81ard 









SP 16 lard 









SP 8 butter. _ 









SP 16 butter 









Littermates fed — 



SP8HVO 



100 







SP 8 lard 







Littermates fed — 



SP 8 HVO 



88 

 100 

 100 



89 

 100 



100 





SPa 16 HVO 





SPb 8 HVO 







Littermates fed — 



SP8HVO 



100 





SPa 16 HVO 





Littermates fed — 



SPE (fresh egg) 







SPEW 



100 









SPEY 









E100 



100 



92 











Not littermates fed — 

 E100 



100 









Y100 









Littermates fed — 



Stock 



67 

 100 



25 



50 



100 









SPE 









Stock changed to SPE at 250 

 days 



75 

 100 



100 







SPE changed to stock at 250 

 days __ _ ... 







23 



