. Author manuscript; available in PMC: 2022 Apr 1.

Published in final edited form as: West J Nurs Res. 2020 Jul 17;43(4):364–373. doi: 10.1177/0193945920942252

Table 3.

DSI Scale Item Level Psychometrics

Item	Content Validity Index¹ (n=686)	% rated item “not necessary”² (n=686)	Item total correlation		Factor Loading
Item	Content Validity Index¹ (n=686)	% rated item “not necessary”² (n=686)	On-Menses³ (n=260)	Off-Menses³ (n=426)	On-Menses³ (n=260)	Off-Menses³ (n=426)

Physical Activities (e.g. walk, run, swim, yoga, & other exercises)	0.15	4.7%	0.73	0.67	.76^***	.71^***

Sleep (falling or staying asleep)	0.48	4.1%	0.64	0.57	.66^***	.60^***

Daily Activities	0.40	3.3%	0.84	0.77	.87^***	.81^***

Work (including work, housework, schoolwork, and homework)	0.39	7.1%	0.75	0.67	.79^***	.71^***

Concentration	0.16	5.1%	0.73	0.70	.76^***	.74^***

Enjoyment of Life	0.30	6.0%	0.81	0.74	.84^***	.78^***

Leisure Activities (time spent relaxing, having fun, doing hobbies, etc.)	−0.03	6.0%	0.76	0.77	.80^***	.82^***

Social activities (time spent with family, friends, etc.)	−0.04	6.3%	0.76	0.73	.79^***	.77^***

Mood (irritable, anxious frustrated, depressed, etc.)	0.60	3.5%	0.65	0.58	.67^***	.61^***

Above critical value 0.064 indicates excellent content validity for a given item.

Below 10% indicates acceptable content validity for a given item.

Time 1 measure was used.

^***

p<.0001.