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Table 4 Comparison of the prevalence and associated factors of poor sleep quality in SSc patients

From: Sleep quality and clinical association with sleep disturbance in systemic sclerosis

Authors

Year

Country

N

Method of sleep quality assessment

Definition of poor sleep quality

Prevalence of poor sleep quality (%)

Factor association

Our study

2021

Thailand

88 (32 lcSSc; 36.4%, 56 dcSSc; 63.6%)

PSQI with mean ± SD of 6.52 ± 3.59

PSQI ≥ 6

54.6% (95%CI 43.6–65.2)

• Digital ulcer (OR 10.73)

• Stomach involvementa (OR 4.60)

Carandina et al. [20]

2021

Italy

20 (16 lcSSc; 80%)

PSQI with median of 8 (IQR 7–10)

PSQI > 5

90%

• Cardiovascular autonomic control (p = 0.03)

• Pain (p = 0.03)

• Depressive symptoms (p < 0.01)

Figueiredo et al. [7]

2020

Brazil

60 (29 lcSSc; 48.3%)

PSQI with mean ± SD of 9.5 ± 4.3

PSQI ≥ 7b

73.3%

• Esophageal involvement (p = 0.03)

• High disease severity (p = 0.01)

• Depressive mood (p = 0.002)

Horsley-Silva et al. [19]

2019

USA

287 (184 lcSSc; 64%)

PSQI in moderate to severe compared to mild heartburn mean ± SD of 9.16 ± 3.98 and 6.75 ± 3.49

PSQI > 5

68%

GERD symptoms (OR 2.53)

Sariyildiz et al. [3]

2013

Turkey

48 (lcSSc 45.5%)

PSQI with mean ± SD of 7.5 ± 3.0

PSQI ≥ 6

68.8%

• Generalized pain

• Fatigue

• Depressive symptoms

• Functional status

• Physical score of the SF-36 (p < 0.001)

Milette et al. [5]

2013

Canada

397 (98 dcSSc; 24.7%)

PROMIS (sleep disturbance scale short form) with mean ± SD of 22.8 ± 8.0

ND

ND

Pearson correlation with PROMIS score

• Gastrointestinal symptoms (p = 0.001)

• Pain (p < 0.001)

• Pruritus (p = 0.024)

Frech et al. [4]

2011

USA

180 (90 lcSSc; 50.9%)

MOS-Sleep measure with mean ± SD of 7.1 ± 1.73 h of sleep a night

Quantity of sleep is scored as the average hours slept per night (0–11 h) report worse score on 4 of 6 scales (except for snoring and sleep quantity)

• 41% for high-ceiling effects for snoring

• 59% for shortness of breath scales

• Worsening pain and dyspnea over the past 1 month

• Reflux scale of the UCLA SCTC GIT 2.0,

• CESD

• FACIT-Fatigue

  1. ND No data, USA United States of America, ESS Epworth Sleepiness Scale, IQR Interquartile range, SE Sleep efficiency, REM of rapid eye movement, SWS Slow wave sleep, PLMI Periodic leg movement Index, RLS Restless legs syndrome, MOS-Sleep scale Medical Outcomes Study sleep measure, SLP-9 9-item sleep problem Index, AHI Apnea–hypopnea index, OSA Obstructive sleep apnea, SDB Sleep-disordered breathing, ODI Oxygen desaturation index, SpO2 pulse oximetry, UCLA SCTC GIT 2.0 University of California at Los Angeles Scleroderma Clinical trial Consortium Gastrointestinal Tract 2.0, CESD Center for Epidemiologic Studies Short Depression scale, FACIT-Fatigue Functional Assessment of Chronic Illness Therapy-Fatigue
  2. aAll were dyspepsia
  3. bCut point for Brazilian Portuguese version