Table 1 Frequency characteristics of problematic mobile phone use (PMPU) in Chinese adolescents
Variable | n (%) | PMPU | χ2 | |
|---|---|---|---|---|
No (n = 16,876) | Yes (n = 5752) | |||
Gender | Â | Â | Â | 13.972*** |
 Male | 10,990 (48.6) | 8074 (73.5) | 2916 (26.5) |  |
 Female | 11,638 (51.4) | 8802 (75.6) | 2836 (24.4) |  |
Grade | Â | Â | Â | 74.736*** |
 Junior high school | 11,993 (53.0) | 9227 (76.9) | 2766 (23.1) |  |
 Senior high school | 10,635 (47.0) | 7649 (71.9) | 2986 (28.1) |  |
Registered residence | Â | Â | Â | 0.967 |
 Rural | 10,882 (48.1) | 8148 (74.9) | 2734 (25.1) |  |
 Urban | 11,746 (51.9) | 8728 (74.3) | 3018 (25.7) |  |
Accommodation type | Â | Â | Â | 43.292*** |
 Boarding student | 11,320 (50.0) | 8227 (72.7) | 3093 (27.3) |  |
 Commuting student | 11,308 (50.0) | 8649 (76.5) | 2659 (23.5) |  |
Type of school | Â | Â | Â | 9.395** |
 Key school | 11,588 (51.2) | 8542 (73.7) | 3046 (26.3) |  |
 Non-key school | 11,040 (48.8) | 8334 (75.5) | 2706 (24.5) |  |
Household structure | Â | Â | Â | 6.118* |
 Only child | 9720 (43.0) | 7169 (73.8) | 2551 (26.2) |  |
 More than one child | 12,908 (57.0) | 9707 (75.2) | 3201 (24.8) |  |
Father’s education level a |  |  |  | 0.001 |
  < High school degree | 13,006 (58.0) | 9707 (74.6) | 3299 (25.4) |  |
  ≥ High school degree | 9424 (42.0) | 7035 (74.6) | 2389 (25.4) |  |
Mother’s education level b |  |  |  | 0.072 |
  < High school degree | 14,335 (63.9) | 10,693 (74.6) | 3642 (25.4) |  |
  ≥ High school degree | 8105 (36.1) | 6059 (74.8) | 2046 (25.2) |  |
Self-reported family economy | Â | Â | Â | 68.203*** |
 Bad | 3240 (14.3) | 2244 (69.3) | 996 (30.7) |  |
 General | 16,345 (72.2) | 12,411 (75.9) | 3934 (24.1) |  |
 Good | 3043 (13.4) | 2221 (73.0) | 822 (27.0) |  |
Number of friends | Â | Â | Â | 56.084*** |
 None | 599 (2.6) | 379 (63.3) | 220 (36.7) |  |
 Few | 14,535 (64.2) | 10,768 (74.1) | 3767 (25.9) |  |
 More | 7494 (33.1) | 5729 (76.4) | 1765 (23.6) |  |