Table 1 Frequency characteristics of the sample in the current study
Variable | Total Sample (n = 25378) | NSSI | x 2 | φ/V | |
|---|---|---|---|---|---|
No (n = 18407) | Yes (n = 6971) | ||||
Gender | 14.534 *** | -0.024 *** | |||
Male | 12325 (48.6) | 8804 (71.4) | 3521 (28.6) | ||
Female | 13053 (51.4) | 9603 (73.6) | 3450 (26.4) | ||
Grade | 4.565 * | −0.013 * | |||
Junior school | 13179 (51.9) | 9483 (72.0) | 3696 (28.0) | ||
Senior high school | 12199 (48.1) | 8924 (73.2) | 3275 (26.8) | ||
Registered residence | 5.836 * | −0.015 * | |||
Rural | 11484 (45.3) | 8244 (71.8) | 3240 (28.2) | ||
Urban | 13894 (54.7) | 10163 (73.1) | 3731 (26.9) | ||
Household structure | 4.151 * | 0.013 * | |||
Only child | 12514 (49.3) | 9149 (73.1) | 3365 (26.9) | ||
More than one child | 12864 (50.7) | 9258 (72.0) | 3606 (28.0) | ||
Father’s educational level a1 | 2.969 | −0.011 | |||
< High school degree | 12781 (50.4) | 9221 (72.1) | 3560 (27.9) | ||
≥ High school degree | 11800 (46.5) | 8629 (73.1) | 3171 (26.9) | ||
Mother’s educational level a2 | 7.413 ** | −0.017 ** | |||
< High school degree | 14261 (56.2) | 10261 (72.0) | 4000 (28.0) | ||
≥ High school degree | 10466 (41.2) | 7694 (73.5) | 2772 (26.5) | ||
Self-reported family economy | 49.988 *** | 0.044 *** | |||
Bad | 3732 (14.7) | 2530 (67.8) | 1202 (32.2) | ||
General | 17064 (67.2) | 12538 (73.5) | 4526 (26.5) | ||
Good | 4582 (18.1) | 3339 (72.9) | 1243 (27.1) | ||
HL | 499.625 *** | 0.140 *** | |||
High | 6159 (24.3) | 5091 (82.7) | 1068 (17.3) | ||
Medium | 12674 (49.9) | 9045 (71.4) | 3629 (28.6) | ||
Low | 6545 (25.8) | 4271 (65.3) | 2274 (34.7) | ||
Psychological symptoms | 1923.561 *** | 0.275 *** | |||
No | 19813 (78.1) | 15661 (79.0) | 4152 (21.0) | ||
Yes | 5565 (21.9) | 2746 (49.3) | 2819 (50.7) | ||