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Table 1 Variable definitions

From: The Clean pilot study: evaluation of an environmental hygiene intervention bundle in three Tanzanian hospitals

Type

Variable

Definition

Impact

Cleanliness (Aerobic Colony Counts—ACC)

Binary (< 2.5 cfu/cm2 = clean; ≥ 2.5 cfu/cm2 = not clean)

Categorical (0; > 0 to < 2.5; 2.5 to < 12; 12 to < 40; 40+)

Impact

Cleanliness (S. aureus)

Binary: presence or absence of S. aureus

Process outcome

Cleaning action (gel dots)

Binary (cleaning performed: gel dot completely removed; failure: gel dot not removed or only partially removed)

Outcome predictor

Ward type

Categorical (labour ward, postnatal vaginal deliveries, post-natal c-section deliveries, neonatal ward OR KMC ward)

Outcome predictor

Hospital

Categorical (1, 2, 3)

Outcome predictor

Bed occupancy

Occupancy is the number of patients divided by the number of beds in that specific ward

[Note: Number of patients was collected during each visit. For labour ward only it refers to the number of patients present during last shift]

Study characteristic

Shift type

Categorical (gel dots applied either morning, afternoon or night)

Study characteristic

Bed frame/mattress

Binary (mattress or bed sampled)

Context

Water availability

Binary (whether water is flowing from at least one access point: yes, no)

Context

Chlorine availability

Binary (whether chlorine is available in the central store and within the expiry date: yes, no)