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. 2021 Mar 27;7:100051. doi: 10.1016/j.cpnec.2021.100051

Table 2.

Overview about significant moderation models (including confounders) with PSQI as independent variables, PHQ-9total or MBI-GStotal as dependent variables and HPA axis-related hormones as moderators.

b SE t P
cross-sectional PHQ-9total
Constant 8.27 1.29 6.41 < 0.001
PSQIduration −1.10 0.22 −5.01 < 0.001
hC 0.33 0.76 0.43 0.67
PSQIduration∗hC 1.10 0.52 2.11 0.04
Constant 8.74 1.29 6.76 < 0.001
PSQIduration −1.18 0.22 −5.39 < 0.001
hCn −0.53 0.94 −0.57 0.57
PSQIduration∗hCn 2.60 0.94 2.77 < 0.01
cross-sectional MBI-GStotal
Constant 2.40 0.30 7.96 < 0.001
PSQItotal 0.17 0.02 9.17 < 0.001
hC/hCn −0.50 0.29 −1.74 0.08
PSQItotal∗hC/hCn 0.16 0.08 1.99 < 0.05
Constant 2.02 0.35 5.83 < 0.001
PSQIduration −0.20 0.06 −3.45 < 0.001
hDHEA −0.17 0.16 −1.09 0.27
PSQIduration∗hDHEA 0.31 0.15 2.12 0.03
Constant 2.07 0.35 5.86 < 0.001
PSQIduration −0.20 0.06 −3.40 < 0.001
hC/hDHEA −0.04 0.02 −1.95 0.05
PSQIduration∗hC/hDHEA 0.03 0.01 2.10 0.04
Constant 2.25 0.32 6.96 < 0.001
PSQIefficiency −0.03 0.01 −5.31 < 0.001
hC −0.37 0.20 −1.89 0.06
PSQIefficiency∗hC −0.02 0.01 −2.08 0.04
Constant 2.36 0.33 7.23 < 0.001
PSQIefficiency −0.03 0.01 −4.90 < 0.001
hC/hCn −0.69 0.28 −2.45 0.01
PSQIefficiency∗hC/hCn −0.05 0.02 −2.71 < 0.01
longitudinal MBI-GStotal
Constant 0.51 0.36 1.39 0.17
PSQIduration-bl −0.02 0.05 −0.36 0.72
hC/hCn −0.07 0.22 −0.33 0.74
PSQIduration-bl∗hC/hCn −0.42 0.21 −2.05 0.04

Note. b ​= ​regression coefficient; SE ​= ​standard error; PSQI(total) (-bl) ​= ​Pittsburgh Sleep Quality Index (total score) (-baseline); hC ​= ​hair cortisol concentration; hCn ​= ​hair cortisone concentration; hDHEA ​= ​hair dehydroepiandrosterone concentration; hC/hCn ​= ​ratio of hair cortisol concentration and hair cortisone concentration; hC/hDHEA ​= ​ratio of hair cortisol concentration and hair dehydroepiandrosterone concentration; included confounders (age, gender, body mass index, smoking status, alcohol consumption, caffeine consumption, medication intake [oral contraceptives, antidepressants, other psychopharmacological treatment], hair washes per week, hair treatment [tint, coloration, permanent wave], in longitudinal analyses additionally time interval [days] between assessment points); the presentation of confounders statistics has been omitted for reasons of space.