Table 1 Baseline characteristic of study participants according to depressive symptoms status (N = 10,451)
From: Association of depressive symptoms and risk of knee pain: the moderating effect of sex
|  | Depressive symptoms | Total (N = 10,451) | p value | |
|---|---|---|---|---|
With (N = 3,368) | Without (N = 7,083) | |||
Age, mean (SD), years | 60.19(9.72) | 59.10(9.49) | 59.45(9.58) |  < 0.001 |
Sex, n (%) |  |  |  |  < 0.001 |
 Female | 2,020(59.98) | 3,329(47.00) | 5,349(51.18) |  |
 Male | 1,348(40.02) | 3,754(53.00) | 5,102(48.82) |  |
Education attainment, n (%) |  |  |  |  < 0.001 |
 Illiterate | 1,075(31.92) | 1,578(22.28) | 2,653(25.39) |  |
 Primary school | 1,483(44.03) | 2,756(38.91) | 4,239(40.56) |  |
 Middle school | 600(17.81) | 1,708(24.11) | 2,308(22.08) |  |
 High school or above | 210(6.24) | 1,041(14.70) | 1,251(11.97) |  |
Marital status, n (%) |  |  |  |  < 0.001 |
 Otherwise (divorced, widowed, never married) | 512(15.20) | 645(9.11) | 1,157(11.07) |  |
 Currently married or partnered | 2,856(84.80) | 6,438(90.89) | 9,294(88.93) |  |
Type of neighborhood, n (%) |  |  |  |  < 0.001 |
 Rural | 2,876(85.39) | 5,485(77.44) | 8,361(80.00) |  |
 Urban | 492(14.61) | 1,598(22.56) | 2,090(20.00) |  |
Household income per capita, n (%) |  |  |  |  < 0.001 |
 Quantile 1 (lowest) | 1,088(32.30) | 1,524(21.52) | 2,612(24.99) |  |
 Quantile 2 | 945(28.06) | 1,668(23.55) | 2,613(25.00) |  |
 Quantile 3 | 770(22.86) | 1,843(26.02) | 2,613(25.00) |  |
 Quantile 4 (highest) | 565(16.78) | 2,048(28.91) | 2,613(25.00) |  |
Occupation, n (%) |  |  |  |  < 0.001 |
 Non-farming | 1,310(38.90) | 3,024(42.69) | 4,334(41.47) |  |
 Farming | 2,058(61.10) | 4,059(57.31) | 6,117(58.53) |  |
Body mass index (BMI) level, n (%) |  |  |  |  < 0.001 |
 Underweight (BMI < 18.5) | 286(8.49) | 354(5.00) | 640(6.12) |  |
 Normal (18.5 ≤ BMI < 24) | 1,885(55.97) | 3,666(51.76) | 5,551(53.11) |  |
 Overweight (24 ≤ BMI < 28) | 888(26.37) | 2,189(30.90) | 3,077(29.44) |  |
 Obesity (BMI ≥ 28) | 309(9.17) | 874(12.34) | 1,183(11.32) |  |
Cigarette smoking, n (%) |  |  |  |  < 0.001 |
 No | 2,417(71.76) | 4,757(67.16) | 7,174(68.64) |  |
 Yes | 951(28.24) | 2,326(32.84) | 3,277(31.36) |  |
Drinking, n (%) |  |  |  |  < 0.001 |
 None | 2,439(72.42) | 4,511(63.69) | 6,950(66.50) |  |
 Less than once a month | 232(6.89) | 599(8.46) | 831(7.95) |  |
 More than once a month | 697(20.69) | 1,973(27.86) | 2,670(25.55) |  |
Injury, n (%) |  |  |  |  < 0.001 |
 Without | 3,163(93.91) | 6,859(96.84) | 10,022(95.90) |  |
 With | 205(6.09) | 224(3.16) | 429(4.10) |  |
Number of chronic diseases, n (%) |  |  |  |  < 0.001 |
 None | 878(26.07) | 2,879(40.65) | 3,757(35.95) |  |
 One | 1,046(31.06) | 2,254(31.82) | 3,300(31.58) |  |
 Two | 727(21.59) | 1,181(16.67) | 1,908(18.26) |  |
 Three or above | 717(21.29) | 769(10.86) | 1,486(14.22) |  |