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Table 2 Internal Consistency of C-BRIAN Items

From: Reliability and validity of the Chinese version of the biological rhythms interview of assessment in neuropsychiatry in patients with major depressive disorder

BRIAN items

Scale mean if item deleted

Corrected item total correlation

Cronbach’s alpha if item deleted

BRIAN item 1

36.8333

.0.370

.898

BRIAN item 2

36.9833

.603

.891

BRIAN item 3

37.2250

.549

.892

BRIAN item 4

36.9833

.591

.891

BRIAN item 5

36.9917

.504

.894

BRIAN item 6

37.0083

.584

.891

BRIAN item 7

37.2833

.614

.890

BRIAN item 8

37.2000

.635

.890

BRIAN item 9

37.2250

.693

.888

BRIAN item 10

37.7083

.428

.896

BRIAN item 11

37.4500

.639

.890

BRIAN item 12

37.8583

.225

.901

BRIAN item 13

37.2167

.653

.889

BRIAN item 14

37.4083

.535

.893

BRIAN item 15

37.5583

.578

.892

BRIAN item 16

37.3417

.634

.890

BRIAN item 17

37.3917

.548

.892

BRIAN item 18

37.9750

.309

.899