Table 1.
Characteristics of individuals with CKD overall and stratified by sleep duration
| Variables | Overall (N = 1452) |
<7 h (n = 543) |
7–8 h (n = 752) |
>8 h (n = 157) |
|---|---|---|---|---|
| Age (yr) | 60.4 ± 0.8 | 58.5 ± 1.0 | 60.5 ± 1.1 | 66.7 ± 1.9a |
| 18–44 | 22.2 | 25.8 | 21.3 | 14.3a |
| 45–64 | 28.5 | 30.9 | 29.3 | 16.0 |
| >65 | 49.2 | 43.3 | 49.4 | 69.6 |
| Female sex | 58.6 | 56.1 | 59.7 | 61.4 |
| Race | ||||
| Non-Hispanic white | 74.6 | 66.5 | 78.6 | 81.1a |
| Non-Hispanic black | 11.3 | 18.3 | 7.6 | 6.6 |
| Mexican American | 6.7 | 5.9 | 7.3 | 5.9 |
| Other | 7.5 | 9.3 | 6.6 | 6.4 |
| Household income < $20,000/yr | 23.3 | 25.9 | 21.4 | 24.6 |
| Education < high school | 25.8 | 26.9 | 22.7 | 38.9a |
| No health insurance | 11.6 | 9.6 | 13.6 | 7.2a |
| Current smoker | 17.1 | 20.7 | 15.2 | 14.3 |
| Hypertension | 56.8 | 60.9 | 53.8 | 58.9 |
| Diabetes | 27.6 | 32.5 | 24.1 | 29.7a |
| Congestive heart failure | 7.2 | 8.3 | 5.9 | 11a |
| Sleeping pill use | 12.5 | 17.8 | 10.0 | 7.8 |
| Depression (PHQ-9 Score ≥10) | 6.2 | 9.5 | 4.4 | 3.8a |
| Systolic BP (mm Hg) | 132 ± 1 | 133 ± 1 | 132 ± 1 | 131 ± 2 |
| Diastolic BP (mm Hg) | 69 ± 1 | 70 ± 1 | 69 ± 1 | 66 ± 2 |
| BMI ≥30 kg/m2 | 40.9 | 46.2 | 39.0 | 32.2a |
| HbA1c (%) | 6.0 ± 0.1 | 6.1 ± 0.1 | 5.9 ± 0.1 | 6.0 ± 0.2 |
| TC ≥200 mg/dl | 44.6 | 44.7 | 45.8 | 37.9 |
| LDL-C ≥100 mg/dl | 56.5 | 60.8 | 55.7 | 46.9 |
| eGFR (ml/min per 1.73 m2) | 74.3 ± 1.2 | 78.0 ±1.7 | 73.1 ±1.6 | 68.0 ± 2.4a |
| Urine ACR | ||||
| <30 mg/g | 33.3 | 25.2 | 36.9 | 42.4a |
| 30–300 mg/g | 57.4 | 61.7 | 56.3 | 47.9 |
| >300 mg/g | 9.3 | 13.1 | 6.9 | 9.6 |
ACR, albumin-to-creatinine ratio; BMI, body mass index; BP, blood pressure; CKD, chronic kidney disease; eGFR, estimated glomerular filtration rate; HbA1c, glycosylated hemoglobin; LDL-C, low-density lipoprotein cholesterol; PHQ-9, Patient Health Questionnaire for depression screening; TC, total cholesterol.
Values are expressed as weighted means ± SE or weighted percentages.
a
P < 0.05.