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. 2019 Aug 5;19:271. doi: 10.1186/s12887-019-1637-x

Table 2.

Estimated fixed effects from the unconditional growth model for salivary cortisol (sCort) and salivary α-amylase (sAA)

sCort sAA
Coefficient p Coefficient p
Intercept, π0i 1.5530 < .001 5.2300 < .001
time, π1i 0.0412 < .001 0.0007 .837
time2, π2i - 0.0005 < .001 −0.0004 .302

Note: time2 was modelled as a fixed effect