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Table 2 Possible presentation of baseline characteristics in two-period two-intervention cluster randomised crossover trial

From: The quality of reporting in cluster randomised crossover trials: proposal for reporting items and an assessment of reporting quality

Characteristic Intervention sequence AB Intervention sequence BA
  Period 1–Intervention A
Group 1
Period 2–Intervention B
Group 2
Period 1–Intervention B
Group 3
Period 2–Intervention A
Group 4
Time-invariant characteristics
Time-invariant cluster characteristic Such as proportion of each ward type:
Cardiac: 25%
Intensive Care: 40%
Neurology: 35%
Such as proportion of each ward type:
Cardiac: 25%
Intensive Care: 40%
Neurology: 35%
Such as proportion of each ward type:
Cardiac: 35%
Intensive Care: 45%
Neurology: 20%
Such as proportion of each ward type:
Cardiac: 35%
Intensive Care: 45%
Neurology: 20%
Time-invariant participant characteristic (cohort design only) Such as patient sex:
59% male
Such as patient sex:
59% male
Such as patient sex:
48% male
Such as patient sex:
48% male
Time-varying characteristics
Time-varying cluster characteristic Nurse-to-patient ratio over 24 h, Median (IQR):
2.1 (2.0 – 2.2)
Nurse-to-patient ratio over 24 h, Median (IQR):
2.0 (1.9 – 2.1)
Nurse-to-patient ratio over 24 h, Median (IQR):
2.3 (2.1 – 2.4)
Nurse-to-patient ratio over 24 h, Median (IQR):
2.2 (2.1 – 2.4)
Time-varying participant characteristic (cohort and repeated cross-sectional design) Such as patient weight (kg),
Mean (SD):
83.4 (14.2)
Such as patient weight (kg),
Mean (SD):
78.9 (15.6)
Such as patient weight (kg),
Mean (SD):
81.2 (13.2)
Such as patient weight (kg),
Mean (SD):
80.4 (11.2)