Table 2.
Inverse Variance Weighted Simple Linear Regression Models of Each Predictor on GII.4 Proportion
| Predictor | R2 | β | 95% CI |
|---|---|---|---|
| Secretor Proportion | 0.05 | 1.17 | 0.69–1.64 |
| Study Type | 0.02 | ||
| Outbreaks | 0.00 | Reference | |
| Inpatient Cases | 0.03 | −0.06 to 0.11 | |
| Outpatient Cases | 0.00 | −0.10 to 0.11 | |
| Inpatient and Outpatient Cases | −0.03 | −0.12 to 0.06 | |
| Community Cases | −0.10 | −0.23 to 0.04 | |
| Mixed Setting | 0.06 | −0.03 to 0.14 | |
| Not Specified | 0.12 | −0.10 to 0.34 | |
| Age Category | 0.02 | ||
| ≤5 Years | 0.00 | Reference | |
| >5 Years | 0.05 | −0.11 to 0.20 | |
| Mixed | 0.11 | 0.03–0.19 | |
| Pandemic Variant Period | 0.24 | ||
| 2012–2017 | 0.00 | Reference | |
| 1994–2001 | −0.12 | −0.22 to −0.02 | |
| 2002–2003 | 0.15 | 0.03–0.27 | |
| 2004–2005 | 0.29 | 0.17 to 0.42 | |
| 2006–2008 | 0.32 | 0.26–0.39 | |
| 2009–2011 | 0.12 | 0.01–0.23 | |
| Multiple Periods | 0.13 | 0.06–0.20 | |
| WHO Region | 0.05 | ||
| Western Pacific | 0.00 | Reference | |
| Africa | −0.18 | −0.46 to 0.09 | |
| Americas | 0.04 | −0.03 to 0.11 | |
| Southeast Asia | −0.11 | −0.36 to 0.14 | |
| Europe | 0.11 | 0.04 to 0.18 | |
| Eastern Mediterranean | −0.36 | −0.61 to −0.10 | |
| HDI | 0.10 | 1.01 | 0.71–1.31 |
| Detection Method | 0.00 | ||
| RT-PCR | 0.00 | Reference | |
| Other | 0.00 | −0.14 to 0.15 | |
| Unknown | 0.06 | −0.05 to 0.17 | |
| Typing Region | 0.04 | ||
| ORF1 | 0.00 | Reference | |
| ORF2 | −0.11 | −0.18 to −0.04 | |
| ORF1 and ORF2 | −0.03 | −0.13 to 0.06 | |
| Overlap Only | −0.01 | −0.12 to 0.10 | |
| Unknown | 0.03 | −0.07 to 0.14 |
Abbreviations: CI, confidence interval; GII.4, genogroup 2 type 4; HDI, Human Development Index; ORF, open reading frame; RT-PCR, reverse transcription polymerase chain reaction; WHO, World Health Organization.