Table 2. Average scores obtained by health workers, at the cluster and individual level, on knowledge of the management of viral infections affecting the upper respiratory tract and middle ear, Gansu province, China, 2011.
| Health worker type | Average scorea, mean (SD) |
Differenceb (95% CI) | ||||
|---|---|---|---|---|---|---|
| First telephone survey |
Second telephone survey |
|||||
| Control group | Intervention group | Control group | Intervention group | |||
| Allc | (n = 487) | (n = 490) | (n = 487) | (n = 490) | ||
| Cluster level | 0.33 (0.07) | 0.32 (0.6) | 0.32 (0.06) | 0.47 (0.08) | 0.16 (0.157–0.163) | |
| Individual level | 0.33 (0.13) | 0.32 (0.12) | 0.31 (0.11) | 0.47 (0.16) | 0.17 (0.168–0.172) | |
| Family physiciansc | (n = 236) | (n = 243) | (n = 236) | (n = 243) | ||
| Cluster level | 0.35 (0.08) | 0.32 (0.9) | 0.32 (0.07) | 0.45 (0.12) | 0.16 (0.158–0.162) | |
| Individual level | 0.34 (0.13) | 0.33 (0.12) | 0.31 (0.11) | 0.46 (0.16) | 0.16 (0.149–0.171) | |
CI: confidence interval; SD: standard deviation.
a A correct response received 1 point; an incorrect response received 0 points.
b This represents the difference between the intervention and control group in change in average test score between surveys. For example, the difference for all health workers at the cluster level (0.16) was calculated by subtracting the difference in the control group from the difference in the intervention group, as follows (0.47 − 0.32) − (0.32 − 0.33).
c Missing values are imputed.