TABLE 15

Robustness checks for clinical interventions before and after the introduction of prehospital video triage (unadjusted outcomes) for NC London, East Kent and RoE

Clinical interventionsDiD, % (SE)
Adjusted outcomes for ageAdjusted outcomes for sex (female)Adjusted outcomes for NIHSSAdjusted outcomes for type of stroke (infarction)Adjusted outcomes for number of comorbidities (2 or more)Adjusted outcomes for arriving by ambulance
NC London minus RoEEast Kent minus RoENC London minus RoEEast Kent minus RoENC London minus RoEEast Kent minus RoENC London minus RoEEast Kent minus RoENC London minus RoEEast Kent minus RoENC London minus RoEEast Kent minus RoE
Admitted to stroke unit within 4 hours42.74 (12.59)40.29 (5.30)51.348 (6.38)42.611 (5.55)43.10 (10.96)40.95* (5.27)47.91 (5.41)24.68 (12.63)51.42 (7.30)46.47 (8.26)45.68 (13.37)33.24 (3.58)
Brain scan within 1 hour1.38 (6.79)24.03* (0.74)7.453 (0.67)20.88* (0.86)2.7 (5.91)23.15* (0.74)5.44 (0.85)43.48** (0.28)7.61* (0.16)15.10 (2.06)4.83 (4.47)27.87 (9.40)
Thrombolysis
Given thrombolysis (all stroke types)–5.43 (3.19)3.16* (0.12)–2.018 (0.23)4.374* (0.16)–4.25 (2.77)3.50* (0.12)–2.96* (0.09)–4.28 (0.54)–1.96 (0.47)6.61 (0.56)–3.33 (2.50)1.83 (3.73)
Eligible patients for thrombolysis–5.25 (2.13)5.28 (0.49)–2.69 (0.62)7.13 (0.57)–4.15 (1.85)5.80 (0.49)–3.30 (0.49)–6.10** (0.01)–2.66 (0.78)10.50 (1.29)–3.62 (1.99)2.99 (5.45)
Eligible patients given thrombolysis0.35 (0.67)–7.48 (0.74)0.45 (0.85)–6.65 (0.74)0.65 (0.58)–7.25 (0.74)0.53 (0.77)–12.32 (2.59)0.47 (0.88)–5.06 (0.78)0.69 (0.85)–7.66 (3.12)
Thrombolysis (1 hour)–11.32 (3.86)22.17* (0.99)0.84 (1.23)20.66* (0.97)–1.80 (3.36)21.75* (0.98)–0.27 (0.99)31.09 (3.75)0.89 (1.52)17.79* (0.91)–0.85 (3.68)22.81 (5.43)
Assessed by a specialist
Assessed by stroke physician (24 hours)6.16* (1.10)32.16** (0.12)8.17* (0.17)32.99** (0.15)7.4* (0.96)32.40** (0.12)7.84** (0.12)27.10** (0.26)8.18* (0.25)34.51** (0.44)7.70 (0.93)31.23 (2.51)
Assessed by a stroke nurse within 24 hours2.22* (16.01)16.01* (0.37)3.91 (0.42)16.88* (0.36)3.7** (0.37)16.25* (0.37)3.82 (0.39)10.77 (1.63)3.93 (0.40)18.53** (0.24)3.85* (0.09)15.45 (3.01)
Swallow screen within 4 hours19.06 (5.30)31.27 (2.59)23.69 (3.09)32.24 (2.70)20.30* (4.62)31.55 (2.57)22.28 (2.65)24.67 (6.29)23.71 (3.47)33.81 (3.98)21.29 (5.84)27.99* (1.22)

*p < 0.05, **p < 0.01.

SE, standard error.

From: Appendix 1, Supplementary information for analyses

Cover of Prehospital video triage of potential stroke patients in North Central London and East Kent: rapid mixed-methods service evaluation
Prehospital video triage of potential stroke patients in North Central London and East Kent: rapid mixed-methods service evaluation.
Health and Social Care Delivery Research, No. 10.26.
Ramsay AIG, Ledger J, Tomini SM, et al.
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