Variables | No. studies | Study size | OR (95% CI) | I2 (%) | p value |
---|---|---|---|---|---|
Availability of drugs | |||||
 Yes | 3 | 1650 | 2.13 (1.47–2.78) | 0.00 | 0.00 |
 No |  |  | 1 |  |  |
Friendly service | |||||
 Yes | 2 | 997 | 3.85(1.60–6.10) | 0.00 | 0.00 |
 No |  |  | 1 |  |  |
Premium | |||||
 Extra-expense | 2 | 1055 | 1 |  |  |
 No extra-expense |  |  | 2.80 (1.97–3.63) | 34.23 | 0.22 |
Availability of diagnostic services | |||||
 Yes | 3 | 1046 | 1.99(0.27–3.70) | 0.00 | 0.00 |
 No |  |  | 1 |  |  |
Knowledge/awareness of CBHI | |||||
 Yes | 2 | 1155 | 2.52 (1.73–3.30) | 0.00 | 0.34 |
 No |  |  | 1 |  |  |