Table 2.
Subgroup analyses performed in conjunctival hyperemia, conjunctival swab RT-PCR and risk of ocular manifestations.
| Subgroup | Conjunctival hyperemia |
Conjunctival swab RT-PCR |
Risk of ocular manifestations |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Proportion (95%CI) | I2 | Pa | N | Proportion (95%CI) | I2 | Pa | N | OR (95%CI) | I2 | Pa | |
| Location | 0.427 | 0.199 | 0.689 | |||||||||
| China | 10 | 0.032 (0.011, 0.059) | 82 | 7 | 0.010 (0.001, 0.033) | 10 | 6 | 2.93 (1.48, 5.82) | 0 | |||
| Other Asian countries | 7 | 0.151 (0.041, 0.306) | 93 | 3 | 0.076 (0.018, 0.164) | 65 | 3 | 2.28 (1.15, 4.53) | 0 | |||
| Europe | 6 | 0.127 (0.044, 0.242) | 92 | 4 | 0.059 (0.026, 0.101) | 0 | 1 | 7.26 (0.36, 144.69) | NA | |||
| United States | 3 | 0.037 (0.002, 0.105) | 95 | 0 | NA | NA | 1 | 5.05 (0.84, 30.38) | NA | |||
| Sample size | 0.223 | 0.031 | 0.543 | |||||||||
| <100 | 13 | 0.092 (0.056, 0.135) | 49 | 11 | 0.049 (0.024, 0.079) | 20 | 4 | 2.30 (0.85, 6.20) | 15 | |||
| ≥100 | 13 | 0.065 (0.031, 0.109) | 96 | 3 | 0.023 (0.006, 0.049) | 0 | 7 | 3.04 (1.75, 5.26) | 0 | |||
| Study design | 0.811 | 0.709 | 0.490 | |||||||||
| Cross-sectional | 11 | 0.077 (0.035, 0.132) | 96 | 4 | 0.050 (0.008, 0.119) | 77 | 4 | 3.22 (1.72, 6.04) | 0 | |||
| Case series | 15 | 0.078 (0.034, 0.136) | 89 | 10 | 0.034 (0.014, 0.061) | 0 | 7 | 2.32 (1.17, 4.60) | 0 | |||
Abbreviation: OR, odds ratio; 95% CI, 95 confidence intervals; N, study number; NA, not available.
a. P value for heterogeneity between subgroups with meta-regression analysis.