Table 1.

Convergence Insufficiency Symptom Survey overall score^* and mean subscale score^** for performance- and eye-related items prior to treatment.

Patient Characteristic	n	Overall score: mean (SD)	Performance- related subscale score: mean (SD)	Eye-related subscale score: mean (SD)
Sex
Female	131	30.3 (9.2)	2.3 (0.7)	1.8 (0.8)
Male	90	29.2 (8.6)	2.3 (0.8)	1.7 (0.5)
p-value (t-test)		0.40	0.58	0.44
Age
9–10 years	76	28.7 (7.8)	2.3 (0.7)	1.7 (0.7)
11–12 years	69	29.4 (8.6)	2.3 (0.8)	1.8 (0.7)
13–14 years	39	31.2 (10.7)	2.4 (1.0)	1.9 (0.8)
15–17 years	37	31.7 (9.3)	2.3 (0.7)	2.0 (0.8)
p-value (regression)		0.048	0.48	0.022
Race/ethnicity†
African American	59	30.5 (8.7)	2.4 (0.7)	1.8 (0.7)
Hispanic	75	29.4 (9.9)	2.3 (0.8)	1.7 (0.8)
White	78	30.4 (8.1)	2.3 (0.7)	1.9 (0.7)
p-value (ANOVA)		0.69	0.91	0.56
Parent-reported ADHD status††
No ADHD	178	29.5 (8.7)	2.2 (0.8)	1.8 (0.7)
ADHD	34	34.1 (8.6)	2.8 (0.5)	1.9 (0.8)
p-value (t-test)		0.005	<0.0001	0.31

Sum of item responses (range: 0–60)

^**Average level of all items (range: 0–4)

^†n=212 (9 subjects categorized as “other” excluded from analysis)

^††n=212 (Missing ADHD status for 9 children)