Table 1. Cut-off points for each stratum used to group countries and studies for the random-effects meta-analysis of child deaths from rotavirus infection.
| Variable | Stratum |
||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |
| WHO model: under-5 mortality & geographical region | Member States in all regions with very low mortality | Member States in all regions with low mortality | Member States in the Americas with high mortality | Member States in Asia with high mortality | Member States in Africa with high mortality |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 9/14/34 | 19/41/88 | 1/1/6 | 2/8/13 | 8/12/51 |
| Alternative WHO model: under-5 mortality & geographical region | Member States in all regions with very low mortality | Member States in all regions with low mortality except the Americas | Member States in the Americas with low or high mortality | Member States in Asia with high mortality | Member States in Africa with high mortality |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 9/14/34 | 14/29/62 | 6/13/32 | 2/8/13 | 8/12/51 |
| Life expectancy at birth in females (years) | > 76 | 66–75 | 53–65 | 46–53 | 34–45 |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 18/30/63 | 11/26/66 | 3/10/33 | 5/7/16 | 2/3/14 |
| Life expectancy at birth in males (years) | > 76 | 70–75 | 65–69 | 50–64 | 36–49 |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 7/12/28 | 11/22/39 | 11/20/48 | 5/12/49 | 5/8/28 |
| Under-5 mortality rate (per 1 000 live births) | 3–10 | 11–20 | 21–35 | 36–85 | > 86 |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 14/21/44 | 5/11/31 | 9/22/29 | 4/11/37 | 7/11/51 |
| Infant mortality rate (per 1 000 live births) | 2–7 | 8–17 | 18–30 | 31–75 | > 76 |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 11/20/36 | 9/15/38 | 8/19/34 | 5/13/38 | 6/9/46 |
| % DPT3 immunization coverage among 1-year-olds | 97–99 | 93–96 | 86–92 | 76–85 | < 75 |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 9/13/54 | 11/21/31 | 7/18/32 | 6/11/35 | 6/13/40 |
| Natural log of per capita GNI (in PPP international dollars) | > 9.50 | 8.75–9.49 | 8.00–8.74 | 7.25–7.99 | < 7.24 |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 12/21/45 | 11/18/42 | 7/20/38 | 4/9/38 | 5/8/29 |
| % urban population | 80.0–100.0 | 60.0–79.9 | 45.0–59.9 | 30.0–44.9 | < 30.0 |
| No. of countries with studies/no. of studies conducted/no. of countries in stratum | 11/23/35 | 12/17/50 | 8/13/42 | 4/11/35 | 4/12/30 |
DTP3, third dose of diphtheria–tetanus–pertussis vaccine; GNI, gross national income; log, logarithm; PPP, purchasing power parity; WHO, World Health Organization.