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Table 3 Comparison of Women with < 5% Vs. ≥ 5% Weight Loss from Baseline by Sleep Duration, Sleep Quality, and Sleep Disturbance

From: Sleep and weight loss in low-income overweight or obese postpartum women

  Weight loss, T2 vs. T1 Weight loss, T3 vs. T1
  < 5% ≥ 5% P-value$ < 5% ≥ 5% P-value$
  N (row %)   N (row %)  
Sleep duration
 Baseline
 ≥ 7 h 61 (85.92) 10 (14.08) 0.658 50 (73.53) 18 (26.47) 0.819
 < 7 h 239 (87.87) 33 (12.13)   196 (77.78) 56 (22.22)  
Follow-up
 ≥ 7 h 78 (88.64) 10 (11.36) 0.852 63 (79.75) 16 (20.25) 0.288
 < 7 h 203 (87.88) 28 (12.12)   168 (75.00) 56 (25.00)  
Change from baseline
 Kept ≥7 h 36 (87.80) 5 (12.20) 0.783 31 (79.49) 8 (20.51) 0.184
 Increased to ≥7 h 42 (89.36) 5 (10.64)   32 (80.00) 8 (20.00)  
 Kept < 7 h 183 (87.98) 25 (12.02)   153 (76.50) 47 (23.50)  
 Decreased to < 7 h 20 (86.96) 3 (13.04)   15 (62.50) 9 (37.50)  
  Mean ± SD   Mean ± SD  
Sleep qualitya
 Baseline 1.42 ± 0.75 1.40 ± 0.85 0.822 1.44 ± 0.74 1.46 ± 0.83 0.871
 Follow-up 1.35 ± 0.81 1.16 ± 0.75 0.171 1.32 ± 0.77 1.24 ± 0.72 0.388
 Change from T1 −0.07 ± 0.85 −0.29 ± 0.65 0.131 −0.10 ± 0.82 − 0.24 ± 0.76 0.224
Sleep disturbanceb
 Baseline 1.41 ± 0.58 1.44 ± 0.59 0.764 1.40 ± 0.58 1.49 ± 0.58 0.277
 Follow-up 1.27 ± 0.65 1.23 ± 0.68 0.724 1.21 ± 0.67 1.28 ± 0.63 0.411
 Change from T1 −0.14 ± 0.70 −0.21 ± 0.51 0.458 −0.19 ± 0.72 −0.20 ± 0.55 0.883
  1. T1: baseline, T2: 4 months from T1, T3: 7 months from T1. aThe lower score, the better sleep quality. bThe higher score, the more sleep disturbance
  2. $P-values were derived using Chi-square statistics for categorical variables (sleep duration) and two-sample t-tests for continuous variables (sleep quality and sleep disturbance)