Solid lines in Fig. 4b depict length distributions obtained at different durations of the computer-simulated scission process compare favourably with the corresponding length distributions measured by AFM (data points in Fig. 4b), giving good agreement between the modelled and experimentally measured polydispersity index.
Statistical analysis indicates that the duration of computer use for different computer tasks cannot be represented by a single formula with same set of quantitative parameters as those associated with mouse and keyboard activities.
Risk factors for MSP include demographic (gender, age) and other personal characteristics (height, smoking, tendency to somatise), and also psychosocial, organizational and physical aspects of work (duration of computer work, computing skills, awkward postures, repetitive movements, scope for regular breaks and performance of exercises) [ 7- 11].
Descriptions of years of exposure to computer use, the duration of a computer session and the frequency of computer use per week at school and elsewhere, are reported in Additional file 1: Table S2.
There may be misreporting and overestimation of the duration of adolescents' computer use especially if there are different procedures to measure computer time [ 10].
Thus, separate estimates for the duration of total computer use (including reading from the screen, mouse and keyboard use), mouse use and keyboard can be retrieved.
Previous research has shown good agreement between the WorkPace estimate and systematic observation for the duration of total computer use.
At lower power or near subject distances the duration of a computer flash may drop to 1/50,000 second.
The duration of previous computer training ranged from 1 day to 2 years.
The results showed a similar pattern with no significant associations between CTS and the duration of daily computer use (OR<1 h/day 0.9 (0.5 1.7), OR1 4 h/day 0.6 (0.2 1.2) OR>4 h 0.5 (0.2 1.2)).
