Table 4.

Association between Pittsburgh Sleep Quality Index (PSQI) sleep scores at 6 months and successful weight loss over 24 months, restricted to women with any weight loss at 6 months (≥ 1 kg): RR (95% CI)

Sleep score at 6 months	12 months (n = 208)	18 months (n = 205)	24 months (n = 198)
Subjective sleep quality	0.83 (0.64–1.06)	0.74 (0.55–0.98)	0.88 (0.63–1.22)
Sleep latency	1.01 (0.77–1.32)	0.85 (0.63–1.14)	1.16 (0.82–1.64)
Sleep duration	0.64 (0.50–0.81)	0.76 (0.57–1.00)	0.85 (0.61–1.19)
Habitual sleep efficiency	0.85 (0.63–1.14)	0.62 (0.42–0.92)	0.79 (0.52–1.21)
Sleep disturbances	0.99 (0.75–1.31)	0.83 (0.60–1.15)	1.03 (0.73–1.45)
Sleeping medication use	1.02 (0.76–1.35)	0.82 (0.57–1.16)	1.00 (0.67–1.50)
Daytime dysfunction	0.84 (0.66–1.09)	0.87 (0.65–1.17)	0.97 (0.69–1.35)
Global Sleep Score	0.80 (0.62–1.02)	0.72 (0.54–0.95)	1.03 (0.74–1.43)

CI, confidence interval; RR, relative risk.

Successful weight loss defined as losing ≥ 10% body weight between baseline and each follow-up time point. Adjusted for age, BMI, race/ethnicity, and intervention arm.