Table 4.

Associations Between lux level and sleep quality with psychological wellbeing during the 2nd trimester of pregnancy (n=169)^a

Variables	Stressb		Anxietyc		Depressiond
	β (95% CI)	p-value	β (95% CI)	p-value	β (95% CI)	p-value
Global PSQI score	-	-	0.243 (1.092, 4.880)	0.002*	0.259 (1.092, 4.880)	0.001*
Lux level
7 pm- 10 pm	-	-	0.044 (-0.019, 0.032)	0.620	-0.034 (-0.028, 0.019)	0.699
10 pm-1 am	-	-	0.096 (-0.013, 0.050)	0.250	0.113 (-0.009, 0.049)	0.180
1 am-4 am	-	-	0.049 (-0.037, 0.061)	0.632	-0.140 (-0.078, 0.015)	0.177
4 am-7 am	-	-	0.071 (-0.009, 0.018)	0.486	0.049 (-0.010, 0.016)	0.632

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 insignificant at p = 0.202. R = 0.246, R² = 0.061, Adjusted R² = 0.014, Cohen’s f² = 0.06

^cModel significant at p = 0.009. R = 0.344, R² = 0.118, Adjusted R² = 0.074, Cohen’s f² = 0.13

^dModel significant at p = 0.037. R = 0.309, R² = 0.096, Adjusted R² = 0.050, Cohen’s f² = 0.11