Table 1 Rules for classifying associations between variables and screen media exposure
From: Screen time use in children under 3 years old: a systematic review of correlates
Association codes | Meaning of code | % of studies examining variable needed to draw conclusion |
|---|---|---|
(+) | Positive association | 60% or greater |
(−) | Negative association | 60% or greater |
NA | No association | 60% or greater |
U | Unclear association | Less than 60% |
Consistency codes | ||
S | Strong consistency | 70-100% of studies examining given variable support one association |
M | Moderate consistency | 60-70% of studies support one association |
IN | Inconclusive | Fewer than 3 studies examined variable, no conclusions can be drawn |