Table 2.
Quality checklist
|
Ref N° |
Representativeness |
Quality of data |
Definition of LBP |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |
Response rates in relation to invited study sample at baseline. |
Sample sizes |
N/% response at all surveys based on number of participants at first survey |
At least one of the following: Whole target population; Randomly selected sample; or Sample stated to represent general population |
At least one of the following: Reasons for non response described; Non-responders described; Comparison responders-non-responders; or Comparison of sample and target population |
Same mode of data collection for all subjects, and all surveys |
Same definition(s) of LBP outcome variable used for all subjects at all survey |
At least one of the following: Questionnaires, diaries, or interviews validated; Tested for reproductibility or Tested in pilot study |
Precise anatomical delineation of lumbar area; or Reference to easily obtainable article that contains such specification |
Further specification of definition of LBP; Questions put to study subjects quoted; or Reference to easily obtainable article that contains such specification |
Recall periods specified |
Quality score: Number of ‘Yes’/Number of relevant items |
| If new study subjects invited, response rates calculated based on number of invited participants at each survey | (Yes/No) | (Yes/No) | (Yes/No) | (Yes/No) | (Yes/No) | (Yes/No) | (Yes/No) | (Yes/No) | ||||
| [8] |
1088/2405 = 45 % |
1088 |
470/1165 |
No |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
9/11 |
| |
999/2405 = 41% |
999 |
40% |
|
|
|
|
|
|
|
|
82% |
| |
878/2405 = 36% |
878 |
|
|
|
|
|
|
|
|
|
|
| |
827/2405 = 34% |
827 |
|
|
|
|
|
|
|
|
|
|
| |
758/2405 = 31% |
758 |
|
|
|
|
|
|
|
|
|
|
| |
700/2405 = 29% |
700 |
|
|
|
|
|
|
|
|
|
|
| |
614/2405 = 25% |
614 |
|
|
|
|
|
|
|
|
|
|
| |
599/2405 = 25% |
599 |
|
|
|
|
|
|
|
|
|
|
| [9] |
1309/2000 = 65% |
1309 |
765/1309 |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
11/11 |
| |
1198/2000 = 60% |
1198 |
58% |
|
|
|
|
|
|
|
|
100% |
| |
813/2000 = 41% |
813 |
|
|
|
|
|
|
|
|
|
|
| [10] |
1307/1963 = 67% |
1307 |
269/1307 |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
10/11 |
| |
1159/2185 = 53% |
1159 |
21% |
|
|
|
|
|
|
|
|
91% |
| |
1584/2744 = 58% |
1584 |
|
|
|
|
|
|
|
|
|
|
| [11] |
902/1057 = 85% |
902 |
418/902 |
Yes |
No |
Yes |
Yes |
No |
No |
Yes |
Yes |
8/11 |
| |
748/1057 = 71% |
748 |
46% |
|
|
|
|
|
|
|
|
73% |
| |
654/1057 = 62% |
654 |
|
|
|
|
|
|
|
|
|
|
| |
546/1057 = 52% |
546 |
|
|
|
|
|
|
|
|
|
|
| [12] |
340/400 = 85% |
340 |
206/340 |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
11/11 |
| |
participated |
|
76% |
|
|
|
|
|
|
|
|
100% |
| |
Used in analysis: 305/340 = 90% |
|
(95-100% responses) |
|
|
|
|
|
|
|
|
|
| [13] |
? |
7791 |
3881/7791 |
Yes |
Yes |
Yes |
Yes |
No |
No |
Yes |
Yes |
8/11 |
| |
|
6335 |
50% |
|
|
|
|
|
|
|
|
73% |
| |
|
5755 |
|
|
|
|
|
|
|
|
|
|
| |
|
4885 |
|
|
|
|
|
|
|
|
|
|
| |
|
4354 |
|
|
|
|
|
|
|
|
|
|
| [14] |
6118/7769 = 79% |
6118 |
4007/6118 |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
10/11 |
| |
4917/7769 = 63% |
4917 |
65% |
|
|
|
|
|
|
|
|
91% |
| |
4520/7769 = 58% |
4520 |
|
|
|
|
|
|
|
|
|
|
| [15] |
?/308 |
? |
108/308 |
No |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
7/11 |
| |
?/308 |
? |
|
|
|
|
|
|
|
|
|
64% |
| |
?/308 |
? |
|
|
|
|
|
|
|
|
|
|
| |
?/308 |
? |
|
|
|
|
|
|
|
|
|
|
| |
?/308 |
? |
|
|
|
|
|
|
|
|
|
|
| |
?/308 |
? |
|
|
|
|
|
|
|
|
|
|
| |
?/308 |
? |
|
|
|
|
|
|
|
|
|
|
| |
?/308 |
? |
|
|
|
|
|
|
|
|
|
|
| |
197/308 |
197 |
|
|
|
|
|
|
|
|
|
|
| 174/308 | 174 | |||||||||||