| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T228 |
0-11 |
Sentence |
denotes |
Limitations |
| T229 |
12-150 |
Sentence |
denotes |
Our study has some limitations that should be noted: the sample is one of convenience and there has been no previous probability sampling. |
| T230 |
151-216 |
Sentence |
denotes |
We could not include or under-represent some professional groups. |
| T231 |
217-317 |
Sentence |
denotes |
The study is cross-sectional, which helps us to formulate hypotheses, but we cannot prove causality. |
| T232 |
318-577 |
Sentence |
denotes |
We have not taken into account the temporal evolution of the headache in the health professionals who present it, nor have we taken into account other external factors that may influence the headache, such as the exact conditions of the site and type of work. |
| T233 |
578-847 |
Sentence |
denotes |
The last limitation is that we have not considered other confounding variables that could potentially condition a headache, such as dehydration due to the continued use of full PPE in a hot environment or lifestyle, or diet changes derived from stress or lack of sleep. |
