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Table 2 Association between MP use time and inattention (n = 7102)

From: Association between mobile phone use and inattention in 7102 Chinese adolescents: a population-based cross-sectional study

  n (%) P^ OR (95% CI) Adjusted OR (95% CI)#
MP ownership   0.000   
No (ref) 541 (38.21)   1.00 1.00
Yes 4414 (79.29)   5.73 (5.05-6.50) 2.92 (2.51-3.39)**
MP use years   0.095   
0-2 years (ref) 1568 (76.34)   1.00 1.00
3-4 years 1444 (79.04)   1.16 (0.99-1.35) 1.07 (0.88-1.31)
> 4 years 1132 (78.61)   1.14 (0.97-1.34) 1.05 (0.85-1.30)
Minutes on call   0.000   
0-2 years     
0-1 min/day (ref) 344 (81.32)   1.00 1.00
1-6 min/day 594 (79.41)   0.87 (0.64-1.18) 1.15 (0.82-1.60)
> 6 min/day 410 (76.64)   0.76 (0.55-1.06) 1.16 (0.81-1.65)
3-4 years     
0-1 min/day 327 (82.78)   1.05 (0.73-1.51) 1.06 (0.72-1.57)
1-6 min/day 495 (82.14)   1.07 (0.77-1.49) 1.18 (0.83-1.68)
> 6 min/day 398 (80.08)   0.95 (0.68-1.34) 1.31 (0.90-1.91)
>4 years     
0-1 min/day 261 (79.33)   0.86 (0.60-1.25) 0.92 (0.62-1.37)
1-6 min/day 378 (83.44)   1.23 (0.86-1.76) 1.46 (0.99-2.17)
> 6 min/day 338 (78.42)   0.81 (0.58-1.14) 1.12 (0.77-1.64)
Time of entertainment   0.000   
0-2 years     
0-20 min/day (ref) 548 (79.42)   1.00 1.00
21-60 min/day 459 (79.69)   1.03 (0.78-1.36) 1.45 (1.06-1.97)*
> 60 min/day 317 (78.66)   0.98 (0.72-1.32) 1.82 (1.28-2.59)**
3-4 years     
0-20 min/day 410 (82.66)   1.22 (0.90-1.64) 1.11 (0.80-1. 53)
21-60 min/day 440 (82.09)   1.18 (0.88-1.58) 1.33 (0.97-1.83)
> 60 min/day 353 (80.78)   1.19 (0.87-1.62) 1.80 (1.27-2.56)**
>4 years     
0-20 min/day 334 (76.78)   0.98 (0.72-1.32) 0.99 (0.71-1.38)
21-60 min/day 325 (82.70)   1.28 (0.92-1.78) 1.39 (0.97-1.98)
> 60 min/day 294 (80.55)   1.11 (0.80-1.53) 1.87 (1.28-2.73)*
  1. P^obtained through χ 2 test.
  2. #Adjusted for sex, age, Urban/Rural residence and whether living close to mobile base stations.
  3. *P < 0.05. **P < 0.001.
  4. OR: odds ratio, 95% CI: 95% confidence interval.