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Table 2 Prevalence of attempted suicide by sociodemographic, school and academic performance variables

From: Association between attempted suicide and academic performance indicators among middle and high school students in Mexico: results from a national survey

  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    
  1. 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)
  2. Percentages are weighted, frequencies are unweighted; p values adjusted due to the survey design
  3. 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