Key result
Spontaneous subconjunctival hemorrhage is linked to ~2-fold higher rate of hypertension versus controls.
Why the study?
The relationship between spontaneous subconjunctival haemorrhage and hypertension was unclear and warranted investigation.
Case-Control (n=156)
Absolute Event Rate: 46% vs 23%
Spontaneous SCH may warrant BP screening; leaves open whether it identifies sustained hypertension.
The relationship between the condition of spontaneous subconjunctival haemorrhage (SCH) and hypertension was investigated. Seventy eight patients with SCH and 78 controls with unrelated ophthalmic conditions were compared. Blood pressure (BP) was significantly higher at presentation in the group with SCH at 149 (SD 27)/89 (SD 15) versus 142 (SD 25)/81 (SD 12). The proportion of hypertensives by WHO criteria (systolic blood pressure > 160 and/or diastolic blood pressure >95) was 46% on presentation compared with 23% of the control group. The morphology of the lesion did not influence the association with hypertension although there was a suggestion that the group with raised haemorrhages had a tendency to higher systolic blood pressure. It is recommended that all patients with SCH have their BP checked; this will result in the diagnosis of a significant number of new hypertensives.
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Pitts et al. (1992) conducted a case-control in Spontaneous subconjunctival haemorrhage (n=156). Spontaneous subconjunctival haemorrhage vs. Controls with unrelated ophthalmic conditions was evaluated on Hypertension by WHO criteria (systolic > 160 and/or diastolic > 95). Spontaneous subconjunctival haemorrhage was associated with a higher proportion of hypertension at presentation compared to controls with unrelated ophthalmic conditions (46% vs 23%).
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