Table 2.
Prevalence of attempted suicide by sociodemographic, school and academic performance variables
| Level | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Middle school (n = 14,435) | High school (n = 14,084) | |||||||||||
| Sample | Attempts | % | X 2 | df | p value | Sample | Attempts | % | X 2 | df | p value | |
| Sociodemographic and school | ||||||||||||
| Sex | 803.0 | 1 | < 0.001 | 963.0 | 1 | < 0.001 | ||||||
| Male | 7198 | 75 | 1.1 | 6963 | 119 | 1.5 | ||||||
| Female | 7136 | 389 | 5.2 | 7069 | 471 | 6.8 | ||||||
| School shift | 16.9 | 2 | 0.406 | 3.9 | 2 | 0.805 | ||||||
| Morning | 10,963 | 336 | 3.1 | 8654 | 363 | 4.1 | ||||||
| Afternoon | 3121 | 125 | 3.3 | 4141 | 172 | 4.5 | ||||||
| Other | 250 | 3 | 1.5 | 1237 | 55 | 4.3 | ||||||
| School yeara | 220.3 | 2 | < 0.001 | 31.0 | 2 | 0.169 | ||||||
| First year (7th, 10th) | 5667 | 100 | 1.8 | 6511 | 295 | 4.8 | ||||||
| Second year (8th, 11th) | 5436 | 218 | 4.0 | 3819 | 145 | 3.8 | ||||||
| Third year (9th, 12th) | 3231 | 146 | 3.9 | 3702 | 150 | 3.9 | ||||||
| Academic performance | ||||||||||||
| Two years older than expected for grade level | 5.6 | 1 | 0.357 | 19.5 | 1 | 0.162 | ||||||
| No | 13,797 | 452 | 3.1 | 12,831 | 529 | 4.1 | ||||||
| Yes | 537 | 12 | 2.3 | 1201 | 61 | 5.4 | ||||||
| Studying previous year | 62.0 | 1 | 0.085 | 0.6 | 1 | 0.781 | ||||||
| Yes | 13,557 | 440 | 3.0 | 12,906 | 549 | 4.3 | ||||||
| No | 478 | 19 | 6.2 | 891 | 37 | 4.0 | ||||||
| Perceived academic performance | 94.9 | 2 | 0.011 | 49.9 | 2 | 0.052 | ||||||
| Very good | 2997 | 67 | 1.8 | 2082 | 64 | 2.8 | ||||||
| Good | 6458 | 216 | 3.2 | 7489 | 308 | 4.3 | ||||||
| Fair or poor | 4606 | 177 | 3.8 | 4305 | 213 | 4.7 | ||||||
| Number of failed courses | 48.3 | 3 | 0.105 | 28.9 | 3 | 0.298 | ||||||
| None | 11,582 | 353 | 3.0 | 10,266 | 409 | 4.1 | ||||||
| 1 | 952 | 41 | 3.3 | 1449 | 69 | 4.7 | ||||||
| 2 | 615 | 30 | 3.2 | 838 | 43 | 5.9 | ||||||
| 3 or more | 631 | 30 | 5.4 | 992 | 55 | 4.2 | ||||||
Missing Values: Attempted suicide (153; 101 middle school and 52 high school); studying the previous year (544); self-perceived school performance (512); failed courses (1126)
Percentages are weighted, frequencies are unweighted; p values adjusted due to the survey design
a 7th, 8th and 9th grades as equivalents to the three grades of middle school and 10th, 11th and 12th for the three grades of high school. In México, middle and high school are divided into 3 grades each