Table 2 Estimated prevalence (%) of major depressive disorder (MDD) and generalized anxiety disorder (GAD) among Chinese adults

 18~

4.31 (3.09–5.53)

3.37 (2.29–4.46)

5.01 (2.86–7.16)

3.26 (1.51–5.01)

3.89 (2.43–5.35)

3.44 (2.05–4.82)

 30~

5.22 (4.31–6.12)

4.91 (4.03–5.79)

5.68 (4.12–7.24)

4.26 (2.90–5.62)

4.99 (3.88–6.11)

5.27 (4.12–6.41)

 40~

5.77 (5.15–6.39)

5.71 (5.10–6.33)

5.11 (4.16–6.07)

4.48 (3.58–5.37)

6.18 (5.37–6.99)

6.44 (5.62–7.27)

 50~

6.04 (5.52–6.55)

6.01 (5.50–6.52)

4.32 (3.61–5.04)

4.01 (3.32–4.69)

7.14 (6.44–7.84)

7.27 (6.57–7.98)

 60~

6.12 (5.63–6.61)

5.35 (4.89–5.81)

4.47 (3.83–5.11)

3.63 (3.05–4.21)

7.46 (6.740–8.18)

6.75 (6.06–7.44)

 70~

6.50 (5.70–7.29)

5.58 (4.84–6.32)

5.34 (4.29–6.40)

3.85 (2.95–4.76)

7.68 (6.51–8.85)

7.07 (5.95–820)

 P

0.053

0.006

0.350

0.638

< 0.001

0.001

 P _trend

0.002

0.125

0.559

0.380

< 0.001

0.001

 Married/ cohabiting

5.82 (5.55–6.10)

5.43 (5.16–5.70)

4.56 (4.17–4.95)

3.84 (3.48–4.20)

6.70 (6.31–7.09)

6.54 (6.16–6.93)

 Widowed/single/divorced

7.35 (6.41–8.29)

6.37 (5.49–7.26)

6.71 (5.28–8.13)

4.78 (3.57–5.99)

7.79 (6.53–9.04)

7.45 (6.22–8.68)

 P

0.001

0.036

0.001

0.114

0.085

0.148

 Primary school or below

7.19 (6.75–7.63)

6.67 (6.24–7.09)

5.75 (5.03–6.46)

4.50 (3.87–5.14)

7.83 (7.28–8.38)

7.64 (7.10–8.18)

 Junior high school or above

5.01 (4.68–5.34)

4.62 (4.31–4.94)

4.27 (3.83–4.71)

3.65 (3.24–4.05)

5.72 (5.22–6.21)

5.55 (5.07–6.04)

 P

< 0.001

< 0.001

< 0.001

0.022

< 0.001

< 0.001

  < 500

7.80 (7.29–8.30)

6.75 (6.28–7.23)

6.19 (5.48–6.90)

4.54 (3.93–5.15)

9.00 (8.29–9.70)

8.30 (7.63–8.98)

 500~

4.97 (4.53–5.41)

4.80 (4.37–5.23)

3.87 (3.25–4.49)

3.50 (2.91–4.09)

5.74 (5.13–6.34)

5.70 (5.10–6.30)

  ≥ 1000

4.83 (4.40–5.26)

4.86 (4.43–5.29)

4.01 (3.40–4.62)

3.66 (3.08–4.24)

5.44 (4.85–6.03)

5.70 (5.10-)6.30

 P

< 0.001

< 0.001

< 0.001

0.030

< 0.001

< 0.001

 P _trend

< 0.001

< 0.001

< 0.001

0.034

< 0.001

< 0.001

 No

6.26 (5.96–6.57)

5.93 (5.63–6.23)

4.88 (4.35–5.42)

4.02 (3.54–4.51)

6.80 (6.43–7.17)

6.62 (6.25–6.98)

 Yes

4.68 (4.15–5.21)

3.91 (3.42–4.40)

4.64 (4.11–5.18)

3.84 (3.35–4.32)

9.62 (1.33–17.90)

11.54 (2.56–20.52)

 P

< 0.001

< 0.001

0.529

0.598

0.421

0.155

 No

6.35 (6.04–6.65)

5.91 (5.62–6.21)

5.37 (4.86–5.89)

4.29 (3.82–4.75)

6.80 (6.43–7.18)

6.62 (6.25–6.98)

 Yes

4.04 (3.51–4.58)

3.68 (3.17–4.19)

3.85 (3.31–4.39)

3.40 (2.89–3.91)

6.96 (4.26–9.65)

7.54 (4.74–10.34)

 P

< 0.001

< 0.001

< 0.001

0.013

0.912

0.496

 Low

6.35 (5.86–6.84)

4.87 (4.44–5.31)

5.35 (4.67–6.03)

3.82 (3.24–4.39)

7.13 (6.43–7.82)

5.72 (5.09–6.34)

 Moderate

5.89 (5.45–6.330

5.76 (5.32–6.20)

4.80 (4.09–5.52)

4.07 (3.41–4.74)

6.45 (5.90–7.01)

6.64 (6.08–7.20)

 High

5.64 (5.17–6.11)

5.80 (5.33–6.28)

4.19 (3.61–4.78)

3.93 (3.37–4.50)

7.01 (6.30–7.73)

7.63 (6.89–8.380

 P

0.132

0.003

0.039

0.848

0.261

0.001

 P _trend

0.045

0.004

0.011

0.793

0.787

< 0.001

 No

5.52 (5.11–5.93)

5.31 (4.90–5.71)

4.68 (4.07–5.30)

4.11 (3.54–4.69)

6.11 (5.56–6.66)

6.19 (5.64–6.74)

 Yes

6.25 (5.89–6.60)

5.61 (5.27–5.95)

4.82 (4.34–5.29)

3.82 (3.39–4.25)

7.30 (6.80–7.80)

6.95 (6.46–7.43)

 P

0.014

0.398

0.739

0.424

0.002

0.046

 Underweight

6.22 (5.80–6.65)

5.91 (4.24–7.56)

8.19 (5.27–11.11)

5.85 (3.35–8.35)

9.15 (6.44–11.87)

5.95 (3.72–8.18)

 Normal

8.73 (6.75–10.71)

6.07 (5.65–6.49)

5.23 (4.63–5.82)

4.33 (3.78–4.87)

6.98 (6.39–7.58)

7.39 (6.78–8.01)

 Overweight

5.60 (5.19–6.02)

5.34 (4.93–5.75)

4.37 (3.78–4.96)

3.75 (3.20–4.30)

6.42 (5.84–6.99)

6.39 (5.82–6.96)

 Obesity

5.62 (4.99–6.26)

4.56 (3.99–5.14)

3.63 (2.78–4.48)

2.93 (2.17–3.70)

6.79 (5.92–7.66)

5.51 (4.72–6.30)

 P

0.001

0.001

< 0.001

0.012

0.120

0.003

 P _trend

0.003

< 0.001

< 0.001

0.001

0.180

0.001