Sleep duration | |||||||||
---|---|---|---|---|---|---|---|---|---|
Total | Short sleeper (≤6 hours) | Appropriate sleeper (7–8 hours) | Long sleeper (≥9 hours) | p Value | |||||
N | Per cent | N | Per cent | N | Per cent | N | Per cent | ||
Rheumatoid arthritis (RA) | <0.0001 | ||||||||
No | 37 309 | 98.2 | 15 508 | 40.8 | 18 883 | 49.7 | 2918 | 7.7 | |
Yes | 670 | 1.8 | 347 | 51.8 | 58 | 8.7 | 265 | 39.6 | |
Age (year) | <0.0001 | ||||||||
≤29 | 4751 | 12.5 | 1566 | 33.0 | 2569 | 54.1 | 616 | 13.0 | |
30–49 | 14 551 | 38.3 | 5476 | 37.6 | 8259 | 56.8 | 816 | 5.6 | |
50–69 | 13 135 | 34.6 | 6001 | 45.7 | 6253 | 47.6 | 881 | 6.7 | |
≥79 | 5542 | 14.6 | 2812 | 50.7 | 2067 | 37.3 | 663 | 12.0 | |
Gender | <0.0001 | ||||||||
Male | 16 254 | 42.8 | 6732 | 41.4 | 8357 | 51.4 | 1165 | 7.2 | |
Female | 21 725 | 57.2 | 9123 | 42.0 | 10 791 | 49.7 | 1811 | 8.3 | |
Household income level | <0.0001 | ||||||||
Low | 7633 | 20.1 | 3592 | 47.1 | 3226 | 42.3 | 815 | 10.7 | |
Lower middle | 9685 | 25.5 | 4102 | 42.4 | 4790 | 49.5 | 793 | 8.2 | |
Upper middle | 10 216 | 26.9 | 3980 | 39.0 | 5462 | 53.5 | 774 | 7.6 | |
High | 10 445 | 27.5 | 4181 | 40.0 | 5670 | 54.3 | 594 | 5.7 | |
Marital status | <0.0001 | ||||||||
Married | 27 602 | 72.7 | 11 246 | 40.7 | 14 338 | 52.0 | 2018 | 7.3 | |
Single | 5312 | 14.0 | 1889 | 35.6 | 2876 | 54.1 | 547 | 10.3 | |
Separated, divorced | 5065 | 13.3 | 2720 | 53.7 | 1934 | 38.2 | 411 | 8.1 | |
Occupation | <0.0001 | ||||||||
White collar | 12 635 | 33.3 | 5171 | 40.9 | 6846 | 54.2 | 618 | 4.9 | |
Blue collar | 10 340 | 27.2 | 4488 | 43.4 | 5073 | 49.1 | 779 | 7.5 | |
Unpaid employment | 15 004 | 39.5 | 6196 | 41.3 | 7229 | 48.2 | 1579 | 10.5 | |
Residential region | <0.0001 | ||||||||
Urban | 17 032 | 44.9 | 7363 | 43.2 | 8517 | 50.0 | 1152 | 6.8 | |
Rural | 20 947 | 55.2 | 8492 | 40.5 | 10 631 | 50.8 | 1824 | 8.7 | |
Smoking status | 0.402 | ||||||||
Current smoker | 11 101 | 29.2 | 4564 | 41.1 | 5633 | 50.7 | 904 | 8.1 | |
Former smoker | 4552 | 12.0 | 1927 | 42.3 | 2280 | 50.1 | 345 | 7.6 | |
Never smoked | 22 326 | 58.8 | 9364 | 41.9 | 11 235 | 50.3 | 1727 | 7.7 | |
Frequency of alcohol use | <0.0001 | ||||||||
Never drink | 10 950 | 28.8 | 4947 | 45.2 | 5018 | 45.8 | 985 | 9.0 | |
1 times or less per month | 10 786 | 28.4 | 4238 | 39.3 | 5734 | 53.2 | 814 | 7.6 | |
2–4 times per week | 13 510 | 35.6 | 5462 | 40.4 | 7122 | 52.7 | 926 | 6.9 | |
4 times or more per week | 2733 | 7.2 | 1208 | 44.2 | 1274 | 46.6 | 251 | 9.2 | |
Number of days of moderate exercise per week | <0.0001 | ||||||||
Never | 23 187 | 61.1 | 9718 | 41.9 | 11 457 | 49.4 | 2012 | 8.7 | |
1–3 | 9145 | 24.1 | 3741 | 40.9 | 4829 | 52.8 | 575 | 6.3 | |
4–6 | 3318 | 8.7 | 1361 | 41.0 | 1761 | 53.1 | 196 | 5.9 | |
Everyday | 2329 | 6.1 | 1035 | 44.4 | 1101 | 47.3 | 193 | 8.3 | |
Perceived stress | <0.0001 | ||||||||
Very high | 1749 | 4.6 | 920 | 52.6 | 685 | 39.2 | 144 | 8.2 | |
High | 8442 | 22.2 | 3960 | 46.9 | 3887 | 46.0 | 595 | 7.1 | |
Low | 21 556 | 56.8 | 8495 | 39.4 | 11 480 | 53.3 | 1581 | 7.3 | |
Very low | 6232 | 16.4 | 2480 | 39.8 | 3096 | 49.7 | 656 | 10.5 | |
Extent of pain from RA | <0.0001 | ||||||||
Low | 36 660 | 96.5 | 15 099 | 41.2 | 18 708 | 51.0 | 2853 | 7.8 | |
High | 1319 | 3.5 | 756 | 57.3 | 440 | 33.4 | 123 | 9.3 | |
BMI | <0.0001 | ||||||||
Thin (<18.5 kg/m2) | 1908 | 5.0 | 656 | 34.4 | 1010 | 52.9 | 242 | 12.7 | |
Moderate (18.5kg/m-23.9kg/m2) | 19 689 | 51.8 | 7970 | 40.5 | 10 153 | 51.6 | 1566 | 8.0 | |
Overweight (24.0kg/m-26.9kg/m2) | 10 767 | 28.4 | 4649 | 43.2 | 5351 | 49.7 | 767 | 7.1 | |
Obese (≥27.0 kg/m2) | 5615 | 14.8 | 2580 | 46.0 | 2634 | 46.9 | 401 | 7.1 | |
Year | <0.0001 | ||||||||
2007 | 1403 | 3.7 | 576 | 41.1 | 747 | 53.2 | 80 | 5.7 | |
2008 | 6513 | 17.2 | 2672 | 41.0 | 3258 | 50.0 | 583 | 9.0 | |
2009 | 7338 | 19.3 | 2922 | 39.8 | 3796 | 51.7 | 620 | 8.5 | |
2010 | 6059 | 16.0 | 2461 | 40.6 | 3114 | 51.4 | 484 | 8.0 | |
2011 | 5927 | 15.6 | 2535 | 42.8 | 2947 | 49.7 | 445 | 7.5 | |
2012 | 5465 | 14.4 | 2303 | 42.1 | 2762 | 50.5 | 400 | 7.3 | |
2013 | 5274 | 13.9 | 2386 | 45.2 | 2524 | 47.9 | 364 | 6.9 | |
Total | 37 979 | 100.0 | 15 855 | 41.8 | 19 148 | 50.4 | 2976 | 7.8 |
BMI, body mass index.