From: Association of shift work with incident dementia: a community-based cohort study
Characteristics | Shift workers | |
---|---|---|
Shift but non-night shift workers | Night shift workers | |
Sample size, n | 13,729 | 13,721 |
Age (year) | 52.39 ± 7.06 | 51.18 ± 6.85 |
Sex/female | 7036 (51.2) | 4974 (36.3) |
Ethnicity/White | 12,676 (92.3) | 12,287 (89.5) |
Education | ||
Higher | 6234 (45.4) | 5966 (43.5) |
Upper secondary | 1090 (7.9) | 974 (7.1) |
Lower secondary | 2520 (18.4) | 2519 (18.4) |
Vocational | 1435 (10.5) | 1728 (12.6) |
Other | 2450 (17.8) | 2534 (18.5) |
Townsend deprivation index category | ||
Low | 2676 (19.5) | 2642 (19.3) |
Intermediate | 6643 (48.4) | 6500 (47.4) |
High | 4410 (32.1) | 4579 (33.4) |
DM | 582 (4.2) | 645 (4.7) |
HTN | 3041 (22.2) | 3110 (22.7) |
Stroke | 129 (0.9) | 104 (0.8) |
CHD | 370 (2.7) | 405 (3.0) |
Cholesterol-lowering medication | 1600 (11.7) | 1622 (11.8) |
Antihypertensives | 2045 (14.9) | 2095 (15.3) |
Aspirin | 1411 (10.3) | 1415 (10.3) |
BMI (kg/m2) | 27.70 ± 4.91 | 28.21 ± 4.76 |
SBP (mmHg) | 134.84 ± 17.65 | 135.63 ± 17.30 |
TC (mmol/L) | 5.66 ± 1.07 | 5.63 ± 1.09 |
TG (mmol/L) | 1.74 ± 1.06 | 1.87 ± 1.15 |
HDL (mmol/L) | 1.42 ± 0.37 | 1.35 ± 0.35 |
LDL (mmol/L) | 3.56 ± 0.83 | 3.56 ± 0.84 |
HbA1c (%) | 5.42 ± 0.61 | 5.44 ± 0.63 |
No current smoking | 11,871 (86.5) | 11,404 (83.1) |
Alcohol consumption at least weekly | 9218 (67.1) | 9088 (66.2) |
Healthy diet | 8297 (60.4) | 7722 (56.3) |
Regular physical activity | 8109 (59.1) | 8593 (62.6) |
Genetic predisposition to dementia by PRS category | ||
Low | 6804 (49.6) | 6742 (49.1) |
Intermediate | 3596 (26.2) | 3630 (26.5) |
High | 3329 (24.2) | 3349 (24.4) |
Years of work (years) | 12.23 ± 10.34 | 14.07 ± 10.90 |
Sleep duration category (h/day) | ||
≤ 6 | 3956 (28.8) | 4734 (34.5) |
7–8 | 9054 (65.9) | 8283 (60.4) |
≥ 9 | 719 (5.2) | 704 (5.1) |
Chronotype | ||
Definitely a “morning” person | 3835 (27.9) | 3410 (24.9) |
More a “morning” than “evening” person | 4633 (33.7) | 4130 (30.1) |
More an “evening” than a “morning” person | 4013 (29.2) | 4324 (31.5) |
Definitely an “evening” person | 1248 (9.1) | 1857 (13.5) |