Table 1.
OPACH Participant Characteristics by Sleep Duration Quartiles (N = 3,367)
| Average Nightly Sleep Duration Quartiles* | |||||
|---|---|---|---|---|---|
| Overall N = 3,367 | 1 (short) | 2 | 3 | 4 (long) | |
| Characteristics (number missing) | Mean ± SD or n (%) | ||||
| Age, years (0) | 78.9 ± 6.7 | 77.7 ± 6.6 | 78.5 ± 6.5 | 79.6 ± 6.7 | 79.8 ± 6.7 |
| 63–69 | 334 (9.9) | 106 (12.6) | 97 (11.5) | 65 (7.7) | 66 (7.8) |
| 70–79 | 1,295 (38.5) | 372 (44.2) | 329 (39.2) | 301 (35.6) | 293 (34.8) |
| 80–89 | 1,589 (47.2) | 341 (40.5) | 386 (45.9) | 429 (50.8) | 433 (51.5) |
| ≥90 | 149 (4.4) | 22 (2.6) | 28 (3.3) | 50 (5.9) | 49 (5.8) |
| Race/ethnicity (0) | |||||
| White | 1,795 (53.3) | 370 (44.0) | 480 (57.1) | 487 (57.6) | 458 (54.5) |
| Black | 1,007 (29.9) | 311 (37.0) | 216 (25.7) | 223 (26.4) | 257 (30.5) |
| Hispanic | 565 (16.8) | 160 (19.0) | 144 (17.1) | 135 (16.0) | 126 (15.0) |
| Education (18) | |||||
| High school or less | 694 (20.6) | 166 (19.8) | 164 (19.6) | 177 (21.1) | 187 (22.4) |
| Some college | 1,299 (38.6) | 319 (38.1) | 317 (37.9) | 343 (40.8) | 320 (38.3) |
| College graduate | 1,356 (40.3) | 353 (42.1) | 355 (42.5) | 320 (38.1) | 328 (39.3) |
| Lifestyle Factors | |||||
| Alcohol Intake (244) | |||||
| Nondrinker | 1,166 (34.6) | 301 (38.6) | 271 (34.6) | 261 (33.3) | 333 (42.9) |
| <1 drink/week | 1,055 (31.3) | 284 (36.5) | 264 (33.7) | 280 (35.8) | 227 (29.2) |
| 1–4 drinks/week | 538 (16.0) | 125 (16.0) | 128 (16.3) | 155 (19.8) | 130 (16.7) |
| ≥5 drinks/week | 364 (10.8) | 69 (8.9) | 121 (15.4) | 87 (11.1) | 87 (11.2) |
| Physical Activity (0) | |||||
| Minutes/day | 344.4 ± 97.7 | 381.2 ± 103.5 | 358.9 ± 89.7 | 336.4 ± 88.1 | 300.9 ± 90.2 |
| Sleep Disturbances (58) | 6.3 ± 4.5 | 5.9± 4.5 | 6.1 ± 4.3 | 6.4 ± 4.4 | 6.8 ± 4.6 |
| Sleep Medication Use (20) | |||||
| None | 2,747 (81.6) | 726 (86.7) | 680 (81.7) | 669 (79.5) | 672 (80.3) |
| ≤2 times/week | 394 (11.7) | 75 (9.0) | 100 (12.0) | 121 (14.4) | 98 (11.7) |
| ≥3 times/week | 206 (6.1) | 36 (4.3) | 52 (6.3) | 51 (6.1) | 67 (8.0) |
| Health Status Indicators | |||||
| BMI, kg/m 2 (24) | 27.9 ± 5.7 | 28.5 ± 6.0 | 27.7 ± 5.5 | 27.6 ± 5.5 | 27.7 ± 5.5 |
| Physical Functioning (54) | |||||
| 0–100 score | 84.7 ± 17.1 | 85.7 ± 16.6 | 85.8 ± 16.3 | 84.9 ± 16.1 | 82.5 ± 19.1 |
| Depression Score (0–1) (89) | 0.03 ± 0.1 | 0.03 ± 0.1 | 0.03 ± 0.1 | 0.03 ± 0.1 | 0.04 ± 0.1 |
| Self-rated Health (255) | |||||
| At least good | 2,823 (83.8) | 717 (92.6) | 727 (93.1) | 705 (90.0) | 674 (87.1) |
| Comorbidity Index (0) | |||||
| Zero conditions | 609 (18.1) | 172 (20.4) | 169 (20.1) | 151 (17.9) | 117 (13.9) |
| One condition | 1,178 (35.0) | 289 (34.4) | 298 (35.5) | 301 (35.6) | 290 (34.5) |
| Two or more conditions | 1,580 (46.9) | 380 (45.2) | 373 (44.4) | 393 (46.5) | 434 (51.6) |
| Reynolds Risk Score (%) (0) | 12.5 ± 10.9 | 11.5 ± 10.1 | 11.6 ± 10.0 | 12.8 ± 10.6 | 14.1 ± 12.4 |
Note: Numbers do not sum to total due to missing data. BMI = Body mass index.
*Quartile cutpoints for average nightly sleep duration (minutes), Q1 = 221.2–444.1, Q2 = 444.2–488.3, Q3 = 488.4–531.4, Q4 = 531.5–780.5.