The Gestational Obesity Weight Management: Implementation of National Guidelines (GLOWING) study: a pilot cluster randomised controlled trial

Table 2 Feasibility of delivering the intervention as planned

	Large NHS Trust	Small NHS Trust	Total
Eligible midwives (n)	48	19	67
Midwives recruited to GLOWING session (n, %)	48 (100%)	19 (100%)	67 (100%)
Midwives attended GLOWING session (n, %)^a	48 (100%)	19 (100%)	67 (100%)
GLOWING sessions delivered (n)^b	8	5	13
Midwives per session range (mean)	4–8 (6)	3–4 (4)	3–8 (5)
GLOWING delivered to 6 midwives/session as planned (n, %)^c	3 (38%)	0 (0%)	3 (23%)
GLOWING delivered to fewer midwives/session than planned (n, %)	2 (25%)	5 (100%)	7 (53%)
GLOWING delivered to more midwives/session than planned (n, %)	3 (38%)	0 (0%)	3 (23%)
Time required for intervention delivery (weeks)^d	14.3	7.0	14.3
Pilot delivery (n)^e	1	0	1
Delivery of the intervention per protocol (n, %)^e	7 (100%)	5 (100%)	12 (100%)

^aRecruitment rate of midwives attending the intervention delivery (training day) in the intervention arm, calculated as a percentage of all eligible midwives invited to attend
^bIntensity of intervention delivery calculated as the number of intervention sessions required to deliver the intervention to all recruited midwives in the intervention arm
^cFeasibility of intervention delivery, calculated as the number of intervention sessions delivered with the planned number of midwives (six/session) in attendance at each session
^dTime required for intervention delivery, calculated for both intervention sites as the number of weeks from delivering the first and last intervention session
^eFidelity of intervention delivery following the initial pilot intervention session, calculated as the frequency of the delivery of the intervention as planned (i.e. all content delivered in the allocated time) measured by direct observation and video recording of the intervention sessions, and frequency of deviation from protocol

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