Table 1.

Log likelihood and Bayesian Information Criterion values for one-factor models (traditional average) and two-part models (distinguishing frequency and intensity factors)

	One-factor models (traditional average) a	Two-part models b
Pain
Log likelihood	−61921.77	−35207.20
Bayesian Information Criterion	123871.91	70471.15
Tired
Log likelihood	−75426.31	−65525.91
Bayesian Information Criterion	150880.99	131089.51
Stress
Log likelihood	−71570.27	−53955.24
Bayesian Information Criterion	143168.92	107967.24
Sad
Log likelihood	−60718.53	−31645.71
Bayesian Information Criterion	121465.44	63348.17

Note:

^aNumber of parameters = 3;

^bNumber of parameters = 6.