| Attention concentration difficulty | Attention impaired | Attentiveness decreased | Concentration (mental) abnormal | Concentration ability impaired | Concentration impaired | Concentration impairment | Concentration loss | Disturbance in attention | Disturbance in attention NEC | Felt vague | Impairment of attention | Mental concentration decreased | Mental concentration difficult | Mental concentration difficulty | Mental concentration impaired | Poor concentration | Simple disturbance of activity and attention | Vigilance decreased |
