2012最新SCI影響因子(journal citation reports)已于近期公布了，每年的年度SCI期刊的最新影響因子會在下一年度6月中旬左右出來。因此今年公布的影響因子是統計的2012年度sci 期刊分析報告。影響因子是期刊定量評價的重要工具。自1975年開始，美國科學信息研究所每年都會發布上一年度其所收錄期刊的引證報告，將期刊按引證的頻次和影響來劃分等級。期刊影響因子也因其重要的標桿意義而為一些研究機構采用，作為科研評估的指標之一。
在醫學類期刊中，醫學類排在第一的是CA-CANCER J CLIN，影響因子為153.459，第二的是NEJM(影響因子為51.658)，其次是今年超過其它期刊，上升至第三位的Nature出版社旗下期刊NAT REV GENET(影響因子為41.063)。
生物類期刊中，排在前三的依然是Nature出版社旗下期刊：NAT REV GENET(影響因子為41.063);NATURE (影響因子38.597);NAT REV MOL CELL BIO(影響因子37.162)。
三大著名的雜志影響因子分別為：Nature(38.597，相對于去年上升)，Cell(31.957，相對于去年下降)，Science(31.027，相對于去年下降)，Nature雜志領先。
10以上生物醫學類期刊：
Journal Impact Factor
CA-CANCER J CLIN 153.459
NEW ENGL J MED 51.658
NAT REV GENET 41.063
LANCET 39.06
NATURE 38.597
NAT REV MOL CELL BIO 37.162
ANNU REV IMMUNOL 36.556
NAT GENET 35.209
NAT REV CANCER 35
NAT REV IMMUNOL 33.129
NAT REV DRUG DISCOV 33.078
NAT BIOTECHNOL 32.438
CELL 31.957
NAT REV NEUROSCI 31.673
NAT NANOTECHNOL 31.17
SCIENCE 31.027
JAMA-J AM MED ASSOC 29.978
ANNU REV BIOCHEM 27.681
IEEE ENG MED BIOL 26.303
NAT IMMUNOL 26.199
ANNU REV PATHOL-MECH 25.794
CELL STEM CELL 25.315
LANCET ONCOL 25.117
CANCER CELL 24.755
LANCET NEUROL 23.917
ANNU REV PLANT BIOL 23.654
NAT METHODS 23.565
NAT MED 22.864
NAT REV MICROBIOL 22.49
PHARMACOL REV 22.345
ANNU REV PHARMACOL 21.543
NAT CELL BIOL 20.761
ANNU REV NEUROSCI 20.614
LANCET INFECT DIS 19.966
IMMUNITY 19.795
BEHAV BRAIN SCI 18.571
J CLIN ONCOL 18.038
ANNU REV CELL DEV BI 17.983
ECOL LETT 17.949
ANNU REV GENET 17.436
CLIN MICROBIOL REV 17.313
MICROBIOL MOL BIOL R 16.417
TRENDS COGN SCI 16.008
NEURON 15.766
NAT REV NEUROL 15.518
TRENDS ECOL EVOL 15.389
MOL CELL 15.28
ANNU REV PSYCHOL 15.265
PLOS MED 15.253
NAT NEUROSCI 15.251
CIRCULATION 15.202
NAT REV CLIN ONCOL 15.031
MOL PSYCHIATR 14.897
ENDOCR REV 14.873
CELL METAB 14.619
ANNU REV MED 14.603
ALZHEIMERS DEMENT 14.483
NAT CLIM CHANGE 14.472
GENOME RES 14.397
ANNU REV MAR SCI 14.368
JNCI-J NATL CANCER I 14.336
EUR HEART J 14.097
J AM COLL CARDIOL 14.086
ANN INTERN MED 13.976
LIVING REV SOL PHYS 13.833
ARCH GEN PSYCHIAT 13.772
TRENDS NEUROSCI 13.582
FEMS MICROBIOL REV 13.231
J EXP MED 13.214
TRENDS BIOCHEM SCI 13.076
NAT CHEM BIOL 12.948
ANNU REV MICROBIOL 12.9
ADV DRUG DELIVER REV 12.888
DEV CELL 12.861
GASTROENTEROLOGY 12.821
J CLIN INVEST 12.812
PLOS BIOL 12.69
ANNU REV BIOPHYS 12.63
CELL HOST MICROBE 12.609
GENE DEV 12.444
ANNU REV CLIN PSYCHO 12.422
SYST BIOL 12.169
IMMUNOL REV 12.155
J ALLERGY CLIN IMMUN 12.047
AUTOPHAGY 12.042
HEPATOLOGY 12.003
NAT STRUCT MOL BIOL 11.902
Q REV BIOPHYS 11.875
CIRC RES 11.861
TRENDS PLANT SCI 11.808
TRENDS CELL BIOL 11.721
ENERG ENVIRON SCI 11.653
CURR OPIN CELL BIOL 11.41
MOL SYST BIOL 11.34
ADV APPL MECH 11.333
AM J HUM GENET 11.202
ANN NEUROL 11.193
NAT REV ENDOCRINOL 11.025
ANNU REV BIOMED ENG 10.946
J CELL BIOL 10.822
SCI TRANSL MED 10.757
GUT 10.732
J AM CHEM SOC 10.677
CELL RES 10.526
EUR UROL 10.476
NAT REV GASTRO HEPAT 10.426
NAT REV CARDIOL 10.4
ANNU REV ECOL EVOL S 10.375
MOL ASPECTS MED 10.375
MOL BIOL EVOL 10.353
GENOME BIOL 10.288
BIOL REV 10.256
PROG LIPID RES 10.25
ANNU REV PHYTOPATHOL 10.229
NAT PROD REP 10.178
LEUKEMIA 10.164
CANCER DISCOV 10.143
ADV ENERGY MATER 10.043
NAT COMMUN 10.015