Table 3 Impacts of personal factors on the symptom development of AIA by linear regression analyses a,b,c,d
Risk factors | Total score (Adjusted R2=0.31) | Seven subscales | ||||||
|---|---|---|---|---|---|---|---|---|
Lack-of- control | Socialization | Planning | Negative life consequences | Time consuming | Tolerance | Withdrawal | ||
Gender | ||||||||
 Girls (ref.) | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
 Boys | 3.9 (0.8)*** | 0.2(0.1) | 0.6(0.2)*** | 0.0(0.1) | 0.3 (0.1)* | 1.0(0.1)*** | 0.5 (0.1)*** | 1.5(0.3)*** |
Grade | ||||||||
 Junior high school  students (ref.) | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
 Senior high school students | 8.2 (0.9)*** | 0.7(0.1)*** | 2.5(2.3) | 1.7(1.6) | 1.7 (0.2)*** | 2.4(1.6) | 1.0 (0.1)*** | 2.0(0.3)*** |
Monthly money spending (RMB/month) | ||||||||
 <100 (ref.) | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
 ≥300 | 6.1(1.2)*** | 0.5(0.2)** | 1.0(0.3)*** | 0.9(0.2)** | 0.8(0.2)*** | 1.0(0.2)*** | 0.4(0.2)*** | 1.7(0.5)** |
 100~299 | 6.4 (1.0)*** | 0.5(0.1)*** | 0.9(0.2)*** | 0.7(0.1)*** | 0.9 (0.2)*** | 0.9(0.1)*** | 0.5(0.1)*** | 1.9(0.4)*** |
Academic achievements | ||||||||
 Very good (ref.) | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
 Relatively & very bad | 12.6(2.0)*** | 1.3(0.3)*** | 4.0(0.4)*** | 1.6(0.3)*** | 1.3(0.3)*** | 0.2(0.3) | 1.4(0.3)*** | 2.7(0.7)*** |
 General | 4.8(1.6)** | 0.8(0.2)*** | 1.8(0.3)*** | 0.8(0.2)*** | 0.4(0.3) | 0.0(0.2) | 0.5(0.2)* | 0.9(0.5) |
 Relatively good | −1.3(1.6) | 0.1(0.2) | 0.4(0.3) | 0.2(0.2) | −0.4(0.3) | −0.4(0.2) | −0.1(0.2) | −1.1(0.6) |
Purposes to use internet | ||||||||
 Academic learning (ref.) | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
 Games | 20.7(1.4)*** | 2.0(0.2)*** | 3.6(0.3)*** | 2.6(0.2)*** | 3.0(0.3)*** | 2.0(0.2)*** | 1.5(0.2)*** | 6.5(0.5)*** |
 Real-time chatting | 13.6(1.5)*** | 1.4(0.2)*** | 2.2(0.3)*** | 1.8(0.2)*** | 1.9(0.3)*** | 1.4(0.2)*** | 1.0 (0.2)*** | 4.3(0.6)*** |
 Browsing news or e-mails | 4.0 (1.4)** | 0.4(0.2) | 0.4(0.3) | 0.7 (0.2)*** | 0.7 (0.2)** | 0.5 (0.2)* | 0.1(0.2) | 1.4 (0.5)** |
Total hours spent on internet for a whole week (hours/week) | ||||||||
 <7 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
 >28 | 19.9(1.5)*** | 0.7(0.2)*** | 3.4(0.3)*** | 2.4(0.2)*** | 2.2(0.3)*** | 3.2(0.2)*** | 3.3(0.2)*** | 5.6(0.6)*** |
 21 ~28 | 17.1(1.8)*** | 0.9(0.3)*** | 2.6(0.4)*** | 2.1(0.3)*** | 1.9(0.3)*** | 2.1(0.3)*** | 2.7(0.2)*** | 5.5(0.7)*** |
 14 ~21 | 14.5(1.4)*** | 0.8(0.2)*** | 2.6(0.3)*** | 1.8(0.2)*** | 1.6(0.3)*** | 1.7(0.2)*** | 2.4(0.2)*** | 4.0(0.5)*** |
 7~14 | 10.2(1.0)*** | 0.7(0.1)*** | 1.7(0.2)*** | 1.2(0.2)*** | 1.2(0.2)*** | 1.2(0.2)*** | 1.5(0.1)*** | 2.8(0.4)*** |
School type | ||||||||
 Junior high school | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
 Vocational senior high school | 7.1(11.4) | 2.2(1.6) | 2.1(0.2)*** | 1.7(0.2)*** | 0.6(2.0) | 2.2(1.6) | 0.2(1.4) | 3.9(3.9) |
 Ordinary senior high school | 1.9(11.3) | 1.4(1.5) | 1.2(0.2)*** | 1.5(0.2)*** | 0.2(1.9) | 2.8(1.6) | 0.4(1.4) | 3.0(3.9) |
 Key senior high school | 2.9(11.3) | 1.6(1.6) | 0.8(0.3)** | 0.7(0.2)*** | 0.2(1.9) | 2.6(1.6) | 0.3(1.4) | 3.6(3.9) |