Table 3 Impact of Study and Communication Variables on Altmetric Score, Significant Studies with Press Release (n = 16)
From: Effective communications strategies to increase the impact of environmental health research
VARIABLE | MEAN ALTMETRIC SCORE | TEST STATISTIC (Pearson’s r or F-test) | P-VALUE |
|---|---|---|---|
STUDY VARIABLES | |||
Journal Impact Factor | N/A | r = 0.3 | 0.006 |
Sample Size | N/A | r = -0.06 | 0.002 |
Study Type |  | F = 2.16 | 0.139 |
 Cross sectional | 225.8 |  |  |
 Cohort | 90.6 |  |  |
 Case control | 34.5 |  |  |
 Randomized control trial | 406.5 |  |  |
COMMUNICATION VARIABLES | |||
Open Access |  | F = 0.16 | 0.7 |
 Yes | 178.8 |  |  |
 No | 135.6 |  |  |
Publication Day of Week |  | F = 0.70 | 0.63 |
 Monday | 174.5 |  |  |
 Tuesday | 384 |  |  |
 Wednesday | 91.3 |  |  |
 Thursday | 186.2 |  |  |
 Friday | 52.5 |  |  |
 Saturday | 55 |  |  |
Abstract SMOG Index Reading Grade Level | N/A | r = -0.48 | 0.007 |
Press Release SMOG Index Reading Grade Level | N/A | r = -0.18 | 0.007 |
Days Between Publication and Press Release (if issued) |  | F = 6.34 | 0.01 |
 Same Day | 235.2 |  |  |
 One Day | 149.3 |  |  |
 >One Day | 36.7 |  |  |