Table 5.

Linguistic Inquiry and Word Count 2001, 2007, and 2015 positive predictive value and negative predictive value with 95% CI (N=63)^a.

Emotion categories	2001 PPVb (95% CI)	2007 PPV (95% CI)	2015 PPV (95% CI)	2001 NPVc (95% CI)	2007 NPV (95% CI)	2015 NPV (95% CI)
Total affect	0.326d,e (0.315-0.336)	0.268d (0.259-0.277)	0.270e (0.254-0.286)	0.997 (0.997-0.997)	0.997 (0.997-0.998)	0.998 (0.996-0.999)
Positive Emotion	0.256d (0.244-0.268)	0.207d (0.197-0.217)	0.211 (0.191-0.231)	0.998 (0.998-0.998)	0.999 (0.999-0.999)	0.999 (0.997-1.00)
Negative Emotion	0.498d,e (0.479-0.516)	0.377d (0.361-0.395)	0.373e (0.348-0.398)	0.998 (0.998-0.998)	0.998 (0.998-0.998)	0.998 (0.996-1.00)
Anxiety	0.640d (0.605-0.675)	0.477d (0.446-0.508)	0.496 (0.454-0.538)	0.999 (0.999-0.999)	0.999 (0.999-0.999)	0.999 (0.996-1.00)
Anger	0.357e (0.307-0.409)	0.317 (0.273-0.366)	0.375e (0.306-0.444)	0.999 (0.999-0.999)	0.999 (0.999-0.999)	0.999 (0.995-1.00)
Sadness	0.389 (0.349-0.431)	0.351 (0.315-0.389)	0.377 (0.324-0.430)	0.999 (0.999-0.999)	0.999 (0.999-0.999)	0.999 (0.996-1.00)

^aP value corrected after Bonferroni P<.0021 (P=alpha/N).

^bPPV: positive predictive value.

^cNPV: negative predictive value.

^dSignificant difference between Linguistic Inquiry and Word Count 2001 and Linguistic Inquiry and Word Count 2007 at P<.0021.

^eSignificant difference between Linguistic Inquiry and Word Count 2001 and Linguistic Inquiry and Word Count 2015 at P<.0021.