Background
Methods
Study sites and participants
Measures
Suicidal thoughts
Anorexia nervosa
Depression
Demographic characteristics
Statistical analysis
Results
Demographic characteristics of participants
Variables | Number (%) |
---|---|
Gender | |
Male | 4,339(49.61) |
Female | 4,407(50.39) |
Grade | |
Junior school students | 4,414(50.47) |
Senior school students | 4,332(49.53) |
Smoking | |
Yes | 1,877(21.46) |
No | 6,869(78.54) |
Academic achievement | |
High | 3,605(41.22) |
Average | 3,602(41.18) |
Low | 1,539(17.60) |
Living arrangement | |
Two biological parents | 6,543(74.81) |
Biological father or mother | 921(10.53) |
Others | 1,282(14.66) |
Family socioeconomic status | |
High | 472(5.40) |
Average | 6,829(78.08) |
Low | 1,445(16.52) |
Relationship with parents | |
Good | 7,152(91.90) |
Average | 533(6.85) |
Poor | 97(1.25) |
Relationship with classmates | |
Good | 5,255(60.08) |
Average | 3,266(37.34) |
Poor | 225(2.57) |
Feelings about school | |
Good | 5,249(60.02) |
Average | 3,061(35.00) |
Bad | 436(4.99) |
Reactions to parent-child conflict | |
Suffer in silence | 6,898(78.87) |
Argue with parents | 1,848(21.13) |
Anorexia nervosa | |
Never | 2,538(29.02) |
Occasionally | 4,783(54.69) |
Sometimes | 1,169(13.37) |
Often | 256(2.93) |
Suicidal thoughts | |
Yes | 1,069(12.22) |
No | 7,677(87.78) |
Depression | |
Yes | 1,952(22.32) |
No | 6,794(77.68) |
Associations between suicidal thoughts and demographic characteristics
Variables | Univariate OR (95% CI) |
P Value | Multivariatea OR (95% CI) |
P Value |
---|---|---|---|---|
Gender(female) | 1.42(1.25, 1.62) | <0.001 | 1.89(1.59,2.23) | <0.001 |
Grade(Senior) | 0.99(0.87, 1.12) | 0.870 | 0.67(0.56,0.79) | <0.001 |
Smoking(Yes) | 1.97(1.71,2.27) | <0.001 | 1.97(1.63,2.37) | <0.001 |
Academic achievement | ||||
Good | 1.00 | - | 1.00 | - |
Average | 1.12(0.97, 1.30) | 0.120 | 0.93(0.79,1.11) | 0.450 |
Below average | 1.64(1.38, 1.94) | <0.001 | 1.10(0.89,1.36) | 0.390 |
Living arrangement | ||||
Two biological parents | 1.00 | - | 1.00 | - |
Biological father or mother | 1.76(1.46, 2.12) | <0.001 | 1.18(0.82,1.70) | 0.370 |
Others | 1.53(1.29, 1.81) | <0.001 | 0.97(0.77,1.21) | 0.790 |
Family socioeconomic status | ||||
High | 1.00 | - | 1.00 | - |
Average | 0.69(0.53,0.89) | 0.005 | 0.76(0.55,1.05) | 0.100 |
Low | 1.06(0.80,1.41) | 0.680 | 0.89(0.62,1.28) | 0.550 |
Relationship with parents | ||||
Good | 1.00 | - | 1.00 | - |
Average | 2.45(1.97,3.05) | <0.001 | 1.61(1.26,2.05) | <0.001 |
Poor | 3.95(2.55,6.11) | <0.001 | 1.84(1.12,3.03) | 0.020 |
Relationship with classmates | ||||
Good | 1.00 | - | 1.00 | - |
Average | 1.56(1.37,1.78) | <0.001 | 1.28(1.08,1.50) | 0.003 |
Poor | 3.59(2.65,4.86) | <0.001 | 1.79(1.23,2.63) | 0.003 |
Feelings about school | ||||
Good | 1.00 | - | 1.00 | - |
Average | 1.97(1.72,2.25) | <0.001 | 1.41(1.19,1.67) | <0.001 |
Bad | 3.89(3.09,4.90) | <0.001 | 1.77(1.32,2.38) | <0.001 |
Anorexia nervosa | ||||
Never | 1.00 | - | 1.00 | - |
Occasionally | 1.57(1.33,1.85) | <0.001 | 1.21(0.99,1.46) | 0.050 |
Sometimes | 2.21(1.79,2.72) | <0.001 | 1.25(0.97,1.61) | 0.080 |
Often | 3.99(2.92,5.44) | <0.001 | 1.94(1.32,2.85) | 0.001 |
Strategies for conflict(Struggle) | 1.57(1.34,1.81) | <0.001 | 1.34(1.12,1.59) | 0.001 |
Depression(yes) | 6.58(5.75,7.53) | <0.001 | 5.04(4.31,5.90) | <0.001 |
Association of anorexia, depression, and interactions with suicidal thoughts
Variables | With depression(n = 1,952)a
| Without depression(n = 6,794)a
| Full model(n = 8,746)b
| ||||
---|---|---|---|---|---|---|---|
OR (95% CI) |
P Value | OR (95% CI) |
P Value | OR (95% CI) |
P Value | ||
All (n = 8,746) | Anorexia nervosa | ||||||
Never(n = 2,538) | 1.00 | - | 1.00 | - | 1.00 | - | |
Occasionally(n = 4,783) | 0.96(0.71,1.28) | 0.760 |
1.38(1.07,1.79)
|
0.010
|
1.41(1.10,1.82)
|
0.008
| |
Sometimes(n = 1,169) | 0.93(0.65,1.33) | 0.700 |
1.53(1.08,2.18)
|
0.020
|
1.61(1.14,2.28)
|
0.007
| |
Often(n = 256) | 1.30(0.78,2.19) | 0.320 |
2.82(1.62,4.91)
|
<0.001
|
3.02(1.75,5.23)
|
<0.001
| |
Depression(yes) | - | - | - | - |
7.25(5.18,10.14)
|
<0.001
| |
Male (n = 4,339) | Anorexia nervosa | With depression(n = 985)a
| Without depression(n = 3,354)a
| Full model(n = 4,339)b
| |||
Never(n = 1,375) | 1.00 | - | 1.00 | - | 1.00 | - | |
Occasionally(n = 2,318) | 1.10(0.73,1.67) | 0.645 | 1.36(0.93,2.00) | 0.114 | 1.26(0.96,1.67) | 0.101 | |
Sometimes(n = 530) | 0.82(0.47,1.43) | 0.489 | 0.85(0.45,1.61) | 0.622 | 0.92(0.61,1.38) | 0.688 | |
Often(n = 116) | 0.57(0.24,1.36) | 0.207 |
2.75(1.12,6.77)
|
0.027
| 1.16(0.61,2.21) | 0.652 | |
Depression(yes) | - | - | - | - |
5.21(4.11,6.61)
|
<0.001
| |
Female (n = 4,407) | Anorexia nervosa | With depression(n = 967)a
| Without depression(n = 3,440)a
| Full model(n = 4,407)b
| |||
Never(n = 1,163) | 1.00 | - | 1.00 | - | 1.00 | - | |
Occasionally(n = 2,465) | 0.84(0.55,1.28) | 0.407 | 1.38(0.97,1.95) | 0.073 | 1.18(0.90,1.53) | 0.231 | |
Sometimes(n = 639) | 0.96(0.59,1.57) | 0.872 |
2.08(1.33,3.24)
|
0.001
|
1.52(1.09,2.11)
|
0.013
| |
Often(n = 140) |
2.17(1.05,4.48)
|
0.036
|
2.91(1.42,5.95)
|
0.003
|
2.67(1.63,4.39)
|
<0.001
| |
Depression(yes) | - | - | - | - |
5.00(4.03,6.19)
|
<0.001
|