Table 3.

Associations between lux level and sleep quality with psychological wellbeing during the 3rd trimester of pregnancy (n=115)^a

Variables	Stressb		Anxietyc		Depressiond
	β (95% CI)	p-value	β (95% CI)	p-value	β (95% CI)	p-value
Global PSQI score	0.290 (1.410, 6.059)	0.002*	0.247 (0.738, 4.859)	0.008*	0.305 (1.133, 4.530)	0.001*
Lux level
7 pm-10 pm	-0.112 (-0.045, 0.013)	0.268	-0.111 (-0.042, 0.012)	0.265	-0.080 (-0.031, 0.013)	0.425
10 pm-1 am	0.212 (0.002, 0.076)	0.037*	0.161(-0.006, 0.062)	0.106	0.228 (0.004, 0.060)	0.024*
1 am-4 am	0.025 (-0.064, 0.082)	0.807	0.195 (0.000, 0.135)	0.050	0.065 (-0.037, 0.074)	0.512
4 am-7 am	-0.045 (-0.059, 0.037)	0.655	0.028 (-0.038, 0.051)	0.776	-0.092 (-0.054, 0.019)	0.352

Abbreviations: PSQI Pittsburgh Sleep Quality Index, 95% CI 95% Confidence Intervals

*p-value significant at <0.05

^aAdjusted for maternal age and household income

^bModel significant at p = 0.045. R = 0.368, R² = 0.135, Adjusted R² = 0.070, Cohen’s f² = 0.16

^cModel significant at p = 0.014. R = 0.402, R² = 0.162, Adjusted R² = 0.099, Cohen’s f² = 0.19

^dModel significant at p = 0.022. R = 0.389, R² = 0.151, Adjusted R² = 0.087, Cohen’s f² = 0.18