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Table 2
Summary of the number of quasars and sub-DLAs for samples included in this study.
| Sample | Ref. | Δz | QSOs | Sub-DLAs |
| description | included | included | ||
|
|
||||
| EUADP | Paper I | ··· | 250 | 57 |
| Statistical EUADP | This work | 88.2 | 122 | 27 |
| Previous sub-DLA | Péroux et al. (2003a, 2005) | 104.9 | 116 | 62 |
| O’Meara et al. (2007) | ||||
| Combined sub-DLA | This work | 193.1 | 238 | 89 |
Notes.We used a subset of the EUADP sample, dubbed the statistical EUADP sample, combined with previous sub-DLA studies.
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