Table 3. Univariate and multivariable model results on NK cell proportion.

Exposure	Non-adjusted RR, 95%CI, P values	Adjust I RR, 95%CI, P values	Adjust II RR, 95%CI, P values
Ln (NK cells proportion)	0.65 (0.46, 0.94) 0.0205	0.68 (0.47, 0.99) 0.0452	0.84 (0.57, 1.25) 0.3898
Ln (NK cells proportion) (tertile)
Low	Reference	Reference	Reference
Middle	0.61 (0.34, 1.10) 0.1022	0.67 (0.37, 1.22) 0.1890	0.77 (0.40, 1.47) 0.4224
High	0.66 (0.37, 1.19) 0.1686	0.72 (0.40, 1.32) 0.2932	1.00 (0.52, 1.93) 0.9997
P for trend	0.81 (0.60, 1.09) 0.1625	0.85 (0.63, 1.15) 0.2893	1.00 (0.71, 1.39) 0.9787

Notes.

Non-adjusted model adjust for: None

Adjust I model adjust for: gender; age

Adjust II model adjust for: Age; thymus status; Thymectomy; AChR-ab; MUSK-ab; Osserman classification; involvement of pharyngeal muscles; acetylcholinesterase inhibitor use; Immunosuppressants use