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. Author manuscript; available in PMC: 2017 Mar 28.
Published in final edited form as: JAMA. 2015 Aug 25;314(8):791–801. doi: 10.1001/jama.2015.9677

Table 2.

Cognitive Function Test Scores at Baseline by Assignment to Omega-3 Long-Chain Polyunsaturated Fatty Acids (LCPUFAs)

Cognitive Function Test No LCPUFAsa LCPUFAsa P-value
Composite scoreb
 N 1235 1226
 Mean (SD) Z-score 0.4 (5.4) 0.3 (5.2)
Mean (SD) difference (99%CI) −0.19 (−0.73, 0.36) 0.38
Telephone Interview of Cognitive Status (TICS)c
 N 1503 1521
 Mean (SD) points 33.0 (3.4) 33.0 (3.4)
 Mean (SD) difference (99%CI) −0.04 (−0.35, 0.27) 0.75
a

LCPUFAs: Long-chain polyunsaturated fatty acids.

b

Composite score. A composite score was constructed by including the score of all 8 cognitive tests by converting all test results into z-scores and then adding the z-scores. The composite score was computed to obtain an overall score for the battery of cognitive function tests, ranging from −22 to 17, with higher scores representing better function.

c

TICS, Telephone Interview of Cognitive Status; (TICS-M)3 is a version of the Mini Mental State Examination. The TICS score ranges from 0 to 39 points. The higher score denotes better cognitive function.

P-values are from an analysis of covariance comparing the means.