Table 2
Response Rates of E-mail Account Holders in a University Hospital to E-mails Sent in Five Different Layouts
| E-mails Sent | Responses after 96 Hours | Total Responses after 90 Days | |||
| Layout | N | N (% of Column Total) | % of Total Responses | N (% of Column Total) | % of E-mails Sent (= Response Rate) |
| Classic | 2616 | 268 (12.5%) | 74.0% | 362 (12.4%) | 13.8% |
| HTML text | 2616 | 464 (21.6%) | 74.8% | 620* (21.2%) | 23.7% |
| Artwork text | 2615 | 324 (15.1%) | 71.7% | 452* (15.5%) | 17.3% |
| Static image | 2615 | 625 (29.1%) | 74.3% | 841* (28.8%) | 32.2% |
| Animated image | 2614 | 466 (21.7%) | 71.9% | 648* (22.2%) | 24.8% |
| Total | 13076 | 2147 (100%) | 73.5% | 2923 (100%) | 22.4% |
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↵* χ2-test: p < 0.001 vs. classic version.
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The results of two independent e-mail campaigns are combined.
