Table 2.

Baseline PSQI global score and clinical characteristics of 1601 patients

CharacteristicPSQI Global Score
0–56–19
Number1013588
PSQI global score3 (2–4)8 (7–10)
Age, yr61 (54–68)62 (53–69)
Men, N (%)681 (67)350 (60)
Smoking status, N (%)
 Nonsmokers553 (55)300 (51)
 Past smokers308 (30)173 (29)
 Current smokers152 (15)115 (20)
Diabetes, N (%)342 (34)216 (37)
Cardiovascular disease, N (%)206 (20)124 (21)
Body mass index, kg/m223.5±3.623.5±4.1
Systolic BP, mm Hg132±18132±18
Diastolic BP, mm Hg77±1276±11
Serum creatinine, mg/dl1.8 (1.4–2.5)1.8 (1.4–2.5)
eGFR, ml/min per 1.73 m229 (20–38)29 (20–39)
 45–59, N (%)101 (10)53 (9)
 30–44, N (%)389 (38)231 (39)
 15–29, N (%)403 (40)232 (39)
 10–14, N (%)120 (12)72 (12)
Urinary albumin excretion, g/gCr0.53 (0.15–1.30)0.41 (0.09–1.18)
C-reactive protein, mg/dla0.08 (0.04–0.19)0.09 (0.04–0.20)
Medications, N (%)
 RAS blockade832 (82)492 (84)
 Hypnotics
  None975 (96)387 (66)
  ≤2 times/wk17 (2)58 (10)
  ≥3 times/wk21 (2)143 (24)
Beck depression inventory score5 (3–10)10 (6–17)
 ≥11, N (%)236 (23)288 (49)
Sleep duration, h7.4±1.06.0±1.3
PSQI global score at 2 yrb3 (2–5)7 (5–10)
 ≥6, N (%)114 (17)242 (73)
PSQI global score at 3.5 yrc4 (2–5)8 (5–10)
 ≥6, N (%)91 (21)157 (70)
  • Data presented as mean±SD or median (interquartile range), unless otherwise specified. PSQI, Pittsburgh Sleep Quality Index; Cr, creatinine; RAS, renin angiotensin system.

  • a n=762 and 461 for patients with 0–5 and ≥6 baseline PSQI global score, respectively.

  • b n=654 and 233 for patients with 0–5 and ≥6 baseline PSQI global score, respectively.

  • c n=440 and 225 for patients with 0–5 and ≥6 baseline PSQI global score, respectively.