Table 4.
Outcome in variables describing compliance with standard recommendations for variation in computer work (CRIT1 - CRIT8) as defined in Table 1; in total and amongst male and female call centre operators.
| Difference males-females | |||||
|---|---|---|---|---|---|
| Variable |
All N = 140 |
Males N = 43 |
Females N = 97 |
Difference | p-value1 |
| CRIT1 | Duration until accumulation of 5 minutes of standing/walking (min) | ||||
| Mean | 43.1 | 37.8 | 45.5 | -7.7 | 0.057 |
| Median | 40.5 | 36.5 | 41.6 | -5.1 | |
| sd | 21.9 | 16.3 | 23.8 | ||
| Range | 6.6-154 | 6.6-88.6 | 8.8-154 | ||
| CRIT2 | Duration until obtaining an uninterrupted period of 5 minutes in standing/walking (min) | ||||
| Mean | 97.8 | 85.3 | 103 | -18.1 | 0.619* |
| Median | 75.3 | 72.1 | 77.1 | -5.0 | |
| sd | 84.4 | 64.6 | 91.6 | ||
| Range | 9.7-469 | 9.7-400 | 11.4-469 | ||
| CRIT3 | Duration until accumulation of 10 minutes of standing/walking (min) | ||||
| Mean | 68.7 | 60.1 | 72.5 | -12.4 | 0.048 |
| Median | 63.2 | 61.5 | 65.0 | -3.5 | |
| sd | 34.2 | 23.3 | 37.5 | ||
| Range | 12.0-240 | 12.0-133 | 15.7-240 | ||
| CRIT4 | Duration until obtaining an uninterrupted period of 10 minutes in standing/walking (min) | ||||
| Mean | 204 | 192 | 209 | -17 | 0.474* |
| Median | 184 | 175 | 188 | -13 | |
| sd | 122 | 120 | 123 | ||
| Range | 18.6-491 | 18.6-453 | 25.5-491 | ||
| CRIT5 | Proportion of time not standing/walking for 5 accumulated minutes during the previous 60 minutes (%) | ||||
| Mean | 19.0 | 15.9 | 20.4 | -4.6 | 0.251* |
| Median | 13.4 | 11.0 | 15.0 | -4.1 | |
| sd | 17.6 | 14.3 | 18.7 | ||
| Range | 0.0-80.6 | 0.0-57.2 | 0.0-80.6 | ||
| CRIT6 | Proportion of time not standing/walking for an uninterrupted 5 minute period during the previous 60 minutes (%) | ||||
| Mean | 39.5 | 37.8 | 40.2 | -2.4 | 0.576 |
| Median | 40.1 | 39.0 | 40.4 | -1.4 | |
| sd | 23.3 | 21.1 | 24.2 | ||
| Range | 0.0-88.2 | 0.0-86.2 | 0.0-88.2 | ||
| CRIT7 | Proportion of time not standing/walking for 10 accumulated minutes during the previous 60 minutes (%) | ||||
| Mean | 40.0 | 36.8 | 41.5 | -4.7 | 0.277 |
| Median | 41.6 | 38.3 | 45.5 | -7.1 | |
| sd | 23.7 | 20.4 | 24.9 | ||
| Range | 0.0-86.4 | 0.0-73.2 | 0.0-86.4 | ||
| CRIT8 | Proportion of time not standing/walking for an uninterrupted 10 minute period during the previous 60 minutes (%) | ||||
| Mean | 64.7 | 64.0 | 65.1 | -1.1 | 0.709* |
| Median | 71.9 | 71.8 | 72.0 | -0.2 | |
| sd | 22.2 | 22.1 | 22.4 | ||
| Range | 2.2-89.9 | 2.2-88.8 | 6.6-89.9 | ||
1 Two-tailed t-tests or Mann-Whitney test (*) if significant deviation from normal distribution. Boldface p-values indicate a significant difference (p < 0.05)