Table 2 Impact of Study and Communication Variables on Altmetric Score, All Studies (n = 273)
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 = 0.16 | 0.01 |
Sample Size | N/A | r = -0.04 | < 0.001 |
Study Type |  | F = 7.43 | < 0.001 |
 Cross sectional | 14.9 |  |  |
 Cohort | 13 |  |  |
 Case control | 11.9 |  |  |
 Randomized control trial | 144.8 |  |  |
 Ecological | 14 |  |  |
Significant Finding |  | F = 4.06 | 0.045 |
 Yes | 21 |  |  |
 No | 3.8 |  |  |
COMMUNICATION VARIABLES | |||
Open Access |  | F = 3.25 | 0.07 |
 Yes | 23.8 |  |  |
 No | 10.5 |  |  |
Publication Day of Week |  | F = 0.32 | 0.93 |
 Monday | 20.6 |  |  |
 Tuesday | 20.5 |  |  |
 Wednesday | 12.8 |  |  |
 Thursday | 21.7 |  |  |
 Friday | 9.9 |  |  |
 Saturday | 11.9 |  |  |
 Sunday | 3.9 |  |  |
Abstract SMOG Index Reading Grade Level | N/A | r = 0.08 | 0.13 |
Press Release |  | F = 144.14 | < 0.001 |
 Yes | 156 |  |  |
 No | 7.4 |  |  |