Table 2 Association between sitting time and major depressive disorder
| Â | Total | Men | Women | |||
|---|---|---|---|---|---|---|
OR | 95% CI | OR | 95% CI | OR | 95% CI | |
Sitting time (hours) | ||||||
 < 5 | 1.00 |  | 1.00 |  | 1.00 |  |
 5–7 | 1.09 | (0.80-1.48) | 0.83 | (0.45-1.53) | 1.18 | (0.82-1.69) |
 8–10 | 1.56 | (1.15-2.11) | 1.59 | (0.89-2.84) | 1.58 | (1.10-2.25) |
 > 10 | 1.71 | (1.23-2.39) | 2.04 | (1.12-3.73) | 1.62 | (1.08-2.42) |
 P for trendb | 0.0001 |  | 0.0053 |  | 0.004 |  |
Sex | ||||||
 Male | 1.00 |  |  |  |  |  |
 Female | 1.99 | (1.49-2.67) |  |  |  |  |
Age (year) | ||||||
 20–29 | 2.66 | (1.40-5.02) | 1.97 | (0.62-6.29) | 2.82 | (1.31-6.06) |
 30–39 | 2.55 | (1.54-4.23) | 4.27 | (1.72-10.58) | 1.75 | (0.93-3.31) |
 40–49 | 1.85 | (1.14-3.02) | 2.50 | (1.02-6.10) | 1.43 | (0.78-2.62) |
 50–59 | 1.80 | (1.21-2.67) | 1.86 | (0.85-4.06) | 1.65 | (1.03-2.65) |
 60–69 | 1.27 | (0.89-1.80) | 0.83 | (0.40-1.71) | 1.39 | (0.92-2.10) |
 70+ | 1.00 |  | 1.00 |  | 1.00 |  |
Household income level | ||||||
 Low | 3.15 | (2.21-4.50) | 4.31 | (2.14-8.69) | 3.00 | (1.97-4.57) |
 Lower middle | 1.42 | (1.02-1.98) | 1.42 | (0.76-2.68) | 1.49 | (1.00-2.20) |
 Upper middle | 1.03 | (0.74-1.44) | 0.80 | (0.43-1.50) | 1.15 | (0.78-1.70) |
 High | 1.00 |  | 1.00 |  | 1.00 |  |
Educational levels | ||||||
 Middle school or below | 1.41 | (0.96-2.07) | 1.44 | (0.72-2.89) | 1.30 | (0.81-2.08) |
 High school | 1.17 | (0.86-1.59) | 1.27 | (0.72-2.25) | 1.15 | (0.80-1.67) |
 Above college | 1.00 |  | 1.00 |  | 1.00 |  |
Occupation | ||||||
 White collar | 1.00 |  | 1.00 |  | 1.00 |  |
 Pink collar | 1.80 | (1.16-2.81) | 3.24 | (1.50-7.01) | 1.40 | (0.81-2.40) |
 Blue collar | 1.26 | (0.83-1.93) | 1.57 | (0.77-3.19) | 1.12 | (0.65-1.94) |
 Unemployed, housewife or students | 2.07 | (1.44-2.98) | 2.47 | (1.16-5.26) | 1.86 | (1.20-2.88) |
Marital status | ||||||
 Single | 1.13 | (0.74-1.74) | 1.45 | (0.74-2.84) | 0.85 | (0.48-1.51) |
 Married | 1.00 |  | 1.00 |  | 1.00 |  |
 Separated | 1.46 | (1.09-1.96) | 1.56 | (0.76-3.19) | 1.44 | (1.03-2.02) |
Physical activity | ||||||
 No | 1.13 | (0.91-1.41) | 1.04 | (0.69-1.58) | 1.16 | (0.90-1.50) |
 Yes | 1.00 |  | 1.00 |  | 1.00 |  |
Obesity (BMI, kg/m2) | ||||||
 Low-weight (< 18.5) | 2.01 | (1.31-3.09) | 3.72 | (1.61-8.62) | 1.79 | (1.08-2.97) |
 Normal (18.5–24.9) | 1.00 |  | 1.00 |  | 1.00 |  |
 Overweight (25.0–29.9) | 0.87 | (0.67-1.11) | 1.15 | (0.73-1.81) | 0.74 | (0.54-1.01) |
 Obesity (≥ 30.0) | 1.42 | (0.89-2.26) | 1.13 | (0.41-3.11) | 1.50 | (0.89-2.55) |
Current Smoking status | ||||||
 No | 1.00 |  | 1.00 |  | 1.00 |  |
 Yes | 1.94 | (1.41-2.66) | 2.05 | (1.34-3.14) | 1.94 | (1.16-3.25) |
Alcohol use | ||||||
 No | 1.00 |  | 1.00 |  | 1.00 |  |
 Yes | 1.09 | (0.87-1.38) | 1.21 | (0.76-1.95) | 1.11 | (0.85-1.45) |
Number of chronic diseasesa | ||||||
 0 | 1.00 |  | 1.00 |  | 1.00 |  |
 1 | 1.17 | (0.88-1.57) | 1.11 | (0.66-1.87) | 1.13 | (0.79-1.61) |
 ≥ 2 | 1.67 | (1.20-2.33) | 1.79 | (0.95-3.36) | 1.55 | (1.05-2.30) |