Table 2.

Differences in MRI-associated data between the anaesthesia/sedation and FWT group

	Sedation (n = 243)	Feed-and-wrap (n = 189)	Total (n = 432)	p value
Length of the examination (min)
mean ± sd	39 ± 14	32 ± 12	36 ± 14	< 0.001
Field strength
1.5 T	95 (39%)	65 (34%)	160 (37%)	0.366
3 T	148 (61%)	124 (66%)	272 (63%)
Body region
Head	138 (57%)	122 (65%)	260 (60%)	0.096
Neck/thorax	5 (2%)	6 (3%)	11 (2%)
Abdomen	30 (12%)	28 (15%)	58 (13%)
Musculoskeletal	19 (8%)	8 (4%)	27 (6%)
Whole-body/multiple regions*	51 (21%)	25 (14%)	76 (18%)
Indication
Neurological	132 (54%)	117 (62%)	249 (58%)	0.086
Oncological	42 (17%)	19 (10%)	61 (14%)
Visceral	15 (6%)	19 (10%)	34 (8%)
Cardiovascular	1	2 (1%)	3 (1%)
Other	17 (7%)	12 (6%)	29 (7%)
Multiple	36 (15%)	20 (11%)	56 (13%)
Administration of contrast agent
No	169 (70%)	177 (94%)	346 (82%)	< 0.001
Yes	74 (30%)	12 (6%)	86 (20%)
Total number of sequences (t)
Mean ± SD	8.9 ± 3	8.1 ± 2.4	8.5 ± 2.8	0.023
Number of repeated sequences
Mean ± SD	0.13 ± 0.43	0.24 ± 0.56	0.18 ± 0.49	0.007
Reason for sequence repetition
No Sequence repeated	220 (91%)	154 (81%)	374 (87%)	0.015
Technical	3 (1%)	6 (3%)	9 (2%)
Patient motion	17 (7%)	28 (15%)	45 (10%)
Other	3 (1%)	1 (1%)	4 (1%)
Number of sequences with diagnostic limitations** (N)
Mean ± SD	0.07 ± 0.31	0.49 ± 0.96	0.25 ± 0.59	< 0.001
Incidence rate (= N/t)
Mean ± SD	0.0077 ± 0.0033	0.07 ± 0.16	0.035 ± 0.07	< 0.001
Sequence quality score
Mean ± SD	3.96 ± 0.11	3.7 ± 0.43	3.9 ± 0.32	< 0.001

Significant differences are marked in bold. *whole-body (n = 35), head and spine (n = 17), head and neck/thorax (n = 6), abdomen and spine (n = 6), head and abdomen (n = 4), neck/thorax/abdomen (n = 4), head and musculoskeletal (n = 3), abdomen and musculoskeletal (n = 12), ** defined as quality score lower than 3. sd = standard deviation