Corneal thickness in dry eyes in an Iraqi population

Figures & data

Figure 1 McMonnies (1986) questionnaire.

Notes: Adapted from McMonnies CW. Key questions in a dry eye history. J Am Optom Assoc. 1986;57:512–517.⁴⁰ Copyright © 1986 the American Optometric Association.

Table 1 Mean age and SD for patients and control groups

Age	Controls		Patients		Paired t-test	P-value	Significance
Gender	Mean	SD	Mean	SD
Male	39.6	11.89	42.6	12.305	1.418	0.162	NS
Female	42.8	12.48	44.6	11.11	0.99	0.325	NS

Note: P>0.05, nonsignificant.

Abbreviations: NS, nonsignificant; SD, standard deviation.

Table 2 Comparison between mean CCT (μm) and SD for both groups

CCT	Controls		Patients		Paired t-test	P-value	Significance
Gender	Mean	SD	Mean	SD
Male	561.1	28.602	542.4	38.091	2.868	0.006	S
Female	561.4	27.209	532.6	37.080	5.416	<0.01	HS

Notes: P<0.05, significant;

P<0.01, highly significant.

Abbreviations: CCT, central corneal thickness; HS, highly significant; S, significant; SD, standard deviation.

Table 3 Description of CCT (μm; control and patient groups)

CCT (μm)	Control		Patients		Paired t-test	P-value	Significance
	Mean	SD	Mean	SD
20–29	556.9	33.83	533.7	25.39	10.303	<0.01	HS
30–39	569.9	24.47	560.9	46.62	3.304	0.002	HS
40–49	566.8	27.92	528.9	32.42	4.646	<0.01	HS
50–59	554.1	26.32	527.9	35.71	3.755	0.001	HS
≥60	547.6	5.578	529.5	11.81	4.304	0.004	HS

Notes: P<0.05, significant;

P<0.01, highly significant.

Abbreviations: CCT, central corneal thickness; HS, highly significant; SD, standard deviation.

McMonniesCWKey questions in a dry eye historyJ Am Optom Assoc1986575125173489027

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