Table 2 Features of Twitter usea among the people who got lost due to dementia

From: How can we better use Twitter to find a person who got lost due to dementia?

  Total No. (%) Average no. (SD) per person who got lost
People with dementia who can be found Yes No p-valueb Yes No p-valuec
Types of Twitter users:
 No. of tweet-writers 183 44   4.6 (5.0) 3.1 (3.6) 0.258
 From police departments 15 (8.2%) 1 (2.3%) 0.294 0.4 (0.5) 0.1 (0.3) 0.009
 From media organisations 60 (32.8%) 10 (22.7%) 0.265 1.5 (1.7) 0.7 (1.1) 0.051
 No. of retweeters 1807 172   45.2 (148.8) 12.3 (18.3) 0.178
 From police departments 7 (0.4%) 0 (0.0%) 0.884 0.2 (0.5) 0.0 (0.0) 0.003
 From media organisations 6 (0.3%) 2 (1.2%) 0.312 0.2 (0.4) 0.1 (0.4) 0.950
 No. of followers, in thousands 12,338 963   308.4 (749.7) 68.8 (96.4) 0.031 d
 From police departments 388 (3.1%) 9.3 (1.0%) <0.001 3.5 (4.7) 0.7 (2.4) 0.010
 From media organisations 6314 (51.2%) 474 (49.2%) 0.256 8.9 (4.8) 4.5 (5.5) 0.013
Types of Twitter posts:
 No. of original tweets 199 50   5.0 (5.4) 3.6 (3.7) 0.292
 From police departments 19 (9.5%) 1 (2.0%) 0.143 0.5 (0.8) 0.1 (0.3) 0.005
 From media organisations 66 (33.2%) 10 (20.0%) 0.102 1.6 (1.9) 0.7 (1.1) 0.031
 Tweets with photos 175 (88.0%) 37 (74.0%) 0.024 4.4 (5.3) 2.6 (3.5) 0.177
 Tweets with website links 190 (95.5%) 44 (88.0%) 0.098 4.8 (5.4) 3.1 (3.7) 0.224
 Tweets with hashtags 44 (22.1%) 13 (26.0%) 0.691 1.1 (1.6) 0.9 (1.3) 0.696
 Average length of tweets (no. of words)     15.0 (3.8) 17.1 (4.6) 0.136
 No. of retweets 1828 173   45.7 (150.1) 12.4 (18.4) 0.176
 Retweets from police departments 8 (0.4%) 0 (0.0%) 0.809 0.2 (0.6) 0 (0.0) 0.044
 Retweets from media organisations 6 (0.3%) 2 (1.2%) 0.308 0.2 (0.4) 0.1 (0.4) 0.950
 No. of retweet / each original tweet     10.8 (24.8) 6.1 (9.8) 0.324
  1. Remarks:
  2. aAll tweets were counted until the time before the people who could be found. The average time to find the people was 21.4 h from the first post of original tweet. This was also used as the cut-off times for the people who could not be found in the control group
  3. bp-value of Χ2 test, and significant results (p-value <0.05) were shown in bold
  4. cp-value of independent sample t-test, and significant results (p-value <0.05) were shown in bold
  5. dThe number of followers was transformed to logarithmic scale before performing a t-test