Author | Was the sample frame appropriate to address the target population? | Were study participants sampled in an appropriate way? | Was the sample size adequate? | Were the study subjects and the setting described in detail? | Was the data analysis conducted with sufficient coverage of the identified sample? | Were valid methods used for the identification of the condition? | Was the condition measured in a standard, reliable way for all participants? | Was there appropriate statistical analysis? | Was the response rate adequate, and if not, was the low response rate managed appropriately? | Total Quality score | Quality Level category |
Bandara, J. S. | yes | yes | yes | yes | yes | yes | un clear | yes | unclear | 7 | high |
Batisani, N. | yes | yes | yes | yes | yes | yes | yes | yes | unclear | 8 | high |
Brizmohun, R. | yes | unclear | unclear | yes | unclear | yes | yes | yes | yes | 6 | medium |
Brown, M. E. | yes | yes | yes | no | yes | yes | yes | yes | unclear | 7 | high |
Cai, Y. | yes | no | unclear | no | yes | yes | yes | yes | yes | 6 | medium |
Calzadilla, A. | unclear | yes | unclear | no | yes | yes | no | yes | unclear | 4 | medium |
Chen, B. | yes | yes | unclear | no | no | yes | yes | yes | yes | 6 | medium |
Calzadilla, A. | yes | yes | unclear | no | yes | yes | yes | yes | yes | 7 | high |
Delince, J. | yes | yes | yes | yes | yes | yes | yes | yes | yes | 9 | high |
Gohar, A. A. | yes | yes | unclear | yes | unclear | yes | un clear | yes | unclear | 5 | medium |
Gohar, A. A. | yes | yes | unclear | yes | unclear | yes | un clear | yes | unclear | 5 | medium |
Chung, U. | yes | unclear | yes | yes | yes | yes | yes | yes | yes | 8 | high |
Lee, H. l. | Yes | yes | yes | yes | yes | yes | yes | yes | yes | 9 | high |
Lee, H. L | yes | yes | yes | no | yes | yes | yes | yes | yes | 8 | high |
Sassi, M. | yes | yes | unclear | no | yes | yes | yes | yes | yes | 7 | high |
Skjeflo, S. | unclear | unclear | yes | no | yes | yes | yes | yes | unclear | 5 | medium |
Sulser, T. B. | yes | yes | yes | yes | yes | yes | yes | yes | yes | 9 | high |
Tigchelaar, M. | yes | yes | yes | yes | yes | yes | yes | yes | unclear | 8 | high |
Wiebelt, M. | yes | yes | yes | yes | yes | yes | yes | yes | unclear | 8 | high |
Wong, K. K. S. | not applicable | not applicable | unclear | yes | yes | yes | not applicable | yes | yes | 5 | medium |
Wossen, T. | unclear | yes | unclear | yes | yes | yes | yes | yes | unclear | 6 | medium |
Yaffa, S. | yes | yes | unclear | yes | yes | unclear | yes | no | unclear | 5 | medium |
Zidouemba, P. R. | unclear | unclear | unclear | yes | unclear | yes | yes | yes | unclear | 4 | medium |
Alvi, Sh. | Yes | yes | yes | Yes | Yes | Yes | Yes | Yes | Yes | 9 | high |
Sam, A. G. | Yes | yes | unclear | Yes | Yes | Yes | yes | Yes | unclear | 8 | high |
Putra, A. W. | yes | unclear | unclear | yes | yes | yes | unclear | yes | yes | 6 | medium |