Table 1.
Sample characteristics and group comparisons by suicidal behaviorsa
| Total | Suicidal ideation at W1 | Non-suicidal ideation at W1 | pb | Suicide attempts at W1 | Non-suicide attempts at W1 | pb | |
|---|---|---|---|---|---|---|---|
| (n = 9421) | (n = 1276, 13.64%) | (n = 8078, 86.36%) | (n = 366, 3.91%) | (n = 8986, 96.09%) | |||
| Sociodemographic characteristics | |||||||
| Age at baseline (M ± s.d.) | 15.30 (1.61) | 15.43 (1.53) | 15.24 (1.62) | <0.001 | 15.26 (1.52) | 15.26 (1.62) | 0.956 |
| Sex, n(%) | <0.001 | ||||||
| Male | 4279 (45.42) | 412 (32.29) | 3830 (47.41) | 85 (23.22) | 4156 (46.25) | ||
| Female | 5142 (54.58) | 864 (67.71) | 4248 (52.59) | 281 (76.78) | 4830 (53.75) | ||
| Sexual identity, n(%) | <0.001 | <0.001 | |||||
| Heterosexual | 8101 (86.08) | 986 (77.27) | 7037 (87.48) | 258 (70.49) | 7764 (86.73) | ||
| Sexual minority | 1310 (13.92) | 290 (22.73) | 1007 (12.52) | 108 (29.51) | 1188 (13.27) | ||
| Race/ethnicity, n(%) | 0.011 | 0.526 | |||||
| White | 5319 (56.49) | 732 (57.37) | 4564 (56.52) | 197 (53.83) | 5098 (56.75) | ||
| Black | 1931 (20.51) | 218 (17.08) | 1698 (21.03) | 74 (20.22) | 1841 (20.49) | ||
| Hispanic | 1448 (15.38) | 210 (16.46) | 1221 (15.12) | 68 (18.58) | 1363 (15.17) | ||
| Asian | 597 (6.34) | 97 (7.60) | 491 (6.08) | 23 (6.28) | 565 (6.29) | ||
| American Indian | 73 (0.78) | 14 (1.10) | 58 (0.72) | 3 (0.82) | 69 (0.77) | ||
| Other races | 35 (0.37) | 3 (0.24) | 32 (0.40) | 0 (0.00) | 35 (0.39) | ||
| Multiracial | 13 (0.14) | 2 (0.16) | 11 (0.14) | 1 (0.27) | 12 (0.13) | ||
| Maternal education, n(%) | <0.001 | 0.031 | |||||
| No school/less than high school | 1405 (16.44) | 229 (19.72) | 1176 (15.92) | 69 (20.72) | 1336 (16.27) | ||
| High school or equivalent | 3490 (40.83) | 418 (36.00) | 3072 (41.59) | 131 (39.34) | 3359 (40.90) | ||
| Some college | 1109 (12.98) | 163 (14.04) | 946 (12.81) | 52 (15.62) | 1057 (12.87) | ||
| Graduate school and higher | 2543 (29.75) | 351 (30.23) | 2192 (29.68) | 81 (24.32) | 2461 (29.96) | ||
| Public assistance, n(%) | 0.002 | 0.002 | |||||
| None | 6089 (73.04) | 770 (69.24) | 5280 (73.67) | 214 (65.24) | 5835 (73.40) | ||
| At least one | 2247 (26.96) | 342 (30.76) | 1887 (26.33) | 114 (34.76) | 2115 (26.60) | ||
| Social networks | |||||||
| Network structure | |||||||
| Family structure, n(%) | 6096 (72.92) | 796 (12.97) | 5259 (87.03) | 0.134 | 218 (3.78) | 5835 (96.22) | 0.024 |
| Household size, n(%) | 7466 (77.04) | 991 (13.57) | 6429 (86.43) | 0.895 | 281 (4.05) | 7139 (95.95) | 0.853 |
| Peer network size, M ± s.d. | 4.73 (3.68) | 4.70 (3.62) | 4.89 (3.70) | 0.951 | 5.17 (3.42) | 4.87 (3.70) | 0.767 |
| Peer network density, M ± s.d. | 0.29 (0.14) | 0.28 (0.14) | 0.29 (0.14) | 0.173 | 0.28 (0.13) | 0.29 (0.14) | 0.087 |
| Network function | |||||||
| Family cohesion, M ± s.d. | 3.77 (0.82) | 3.25 (0.88) | 3.86 (0.78) | <0.001 | 3.16 (0.91) | 3.80 (0.81) | <0.001 |
| Peer support, M ± s.d. | 3.93 (0.66) | 3.73 (0.74) | 3.97 (0.64) | <0.001 | 3.68 (0.75) | 3.95 (0.65) | <0.001 |
| School connectedness, M ± s.d. | 3.48 (0.54) | 3.23 (0.58) | 3.54 (0.52) | <0.001 | 3.15 (0.63) | 3.52 (0.53) | <0.001 |
| Neighborhood support, M ± s.d. | 0.81 (0.26) | 0.78 (0.28) | 0.82 (0.26) | <0.001 | 0.81 (0.27) | 0.82 (0.26) | 0.011 |
| Depression (M ± s.d.) | 0.66 (0.47) | 1.07 (0.57) | 0.56 (0.42) | <0.001 | 1.18 (0.61) | 0.61 (0.45) | <0.001 |
In Table 1, the left side presents the sociodemographic and depressive symptoms of the total sample based on unimputed data. The right side shows the bivariate analysis between suicidal behaviors and sociodemographic characteristics as well as depression. Cells in bold print indicate significant results.
a
Participant numbers based on unweighted data and percentages based on weighted data.
b
Comparing participants with suicidal ideation and suicide attempts to those without suicide attempts. χ2 analyses were used for categorical variables, whereas the t test was used for continuous variables.